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KAUS NOTAMs

Active notices for Austin-Bergstrom International (AUS · KAUS), Austin, TX. 35 in force, as of 5 Nov 2026 1259Z. · Open on the map

All of Austin-Bergstrom International — runways, frequencies, charts and live weather

Live from the FAA NOTAM Management Service · updated just now

Runway 1

Runway 18R/36L — closedscheduled
Runway 18R/36L is closed.
FAA text
RWY 18R/36L CLSD
11/018Starts in 5d

Taxiway 5

Taxiway G — closedscheduled
Taxiway G is closed between taxiway G3 and taxiway C, lighted and barricaded.
FAA text
TWY G BTN TWY G3 AND TWY C CLSD LGTD AND BARRICADED
11/031Starts in 17h
Taxiway C — closed
Taxiway C is closed between taxiway S and taxiway Z, lighted and barricaded.
FAA text
TWY C BTN TWY S AND TWY Z CLSD LGTD AND BARRICADED
07/125Active · expires in 115d
Taxiway T — closed
Taxiway T is closed, lighted and barricaded.
FAA text
TWY T CLSD LGTD AND BARRICADED
07/122Active · expires in 115d
Apron — closed
Maintenance ramp is closed to aircraft wingspan more than 118 ft.
FAA text
APRON MAINT RAMP CLSD TO ACFT WINGSPAN MORE THAN 118FT
03/146Active · expires in 116d
Taxiway T — closed
Taxiway T between taxiway C and maintenance ramp is closed, lighted and barricaded.
FAA text
TWY T BTN TWY C AND MAINT RAMP CLSD LIGHTED AND BARRICADED
04/070Active · no expiry
All 35 active NOTAMs every severity, with windows and raw text

Runway · 1 active

Runway 18R/36L — closed
High

From 10 Nov 2026 1330Z to 10 Nov 2026 1530Z · NOTAM 11/018 · ICAO A2286/26

RWY 18R/36L CLSD

!AUS 11/018 AUS RWY 18R/36L CLSD 2611101330-2611101530

Taxiway · 9 active

Taxiway G — closed
Medium

From 6 Nov 2026 0530Z to 6 Nov 2026 1200Z · NOTAM 11/031 · ICAO A2301/26

TWY G BTN TWY G3 AND TWY C CLSD LGTD AND BARRICADED

!AUS 11/031 AUS TWY G BTN TWY G3 AND TWY C CLSD LGTD AND BARRICADED 2611060530-2611061200
Taxiway C — closed
Medium

From 23 Jul 2026 0400Z to 28 Feb 2027 1200Z · NOTAM 07/125 · ICAO A1697/26

TWY C BTN TWY S AND TWY Z CLSD LGTD AND BARRICADED

!AUS 07/125 AUS TWY C BTN TWY S AND TWY Z CLSD LGTD AND BARRICADED 2607230400-2702281200
Taxiway T — closed
Medium

From 23 Jul 2026 0400Z to 28 Feb 2027 1200Z · NOTAM 07/122 · ICAO A1691/26

TWY T CLSD LGTD AND BARRICADED

!AUS 07/122 AUS TWY T CLSD LGTD AND BARRICADED 2607230400-2702281200
Apron — closed
Medium

From 24 Mar 2026 1545Z to 1 Mar 2027 0559Z · NOTAM 03/146 · ICAO A0637/26

APRON MAINT RAMP CLSD TO ACFT WINGSPAN MORE THAN 118FT

!AUS 03/146 AUS APRON MAINT RAMP CLSD TO ACFT WINGSPAN MORE THAN 118FT 2603241545-2703010559
Taxiway T — closed
Medium

From 8 Apr 2026 0500Z until further notice · NOTAM 04/070 · ICAO A0796/26

TWY T BTN TWY C AND MAINT RAMP CLSD LIGHTED AND BARRICADED

!AUS 04/070 AUS TWY T BTN TWY C AND MAINT RAMP CLSD LIGHTED AND BARRICADED 2604080500-PERM
Taxiway C — work in progress
Low

From 5 Nov 2026 0530Z to 5 Nov 2026 1200Z · NOTAM 11/030 · ICAO A2300/26

TWY C, C1, C2, S, T, V, W, Z, TWY G BTN RWY 18R/36L AND TWY C WIP GRASS CUTTING ADJ

!AUS 11/030 AUS TWY C, C1, C2, S, T, V, W, Z, TWY G BTN RWY 18R/36L AND TWY C WIP GRASS CUTTING ADJ 2611050530-2611051200
Taxiway C — work in progress
Low

From 9 Nov 2026 0530Z to 12 Nov 2026 1200Z · active DLY 0530-1200 · NOTAM 11/032 · ICAO A2302/26

TWY C WIP GRASS CUTTING ADJ DLY 0530-1200

!AUS 11/032 AUS TWY C WIP GRASS CUTTING ADJ DLY 0530-1200 2611090530-2611121200
Apron — work in progress
Low

From 26 Jan 2026 1400Z to 31 Jan 2027 1400Z · NOTAM 01/074 · ICAO A0123/26

APRON MAINT RAMP WIP CONST LGTD AND BARRICADED

!AUS 01/074 AUS APRON MAINT RAMP WIP CONST LGTD AND BARRICADED 2601261400-2701311400
Taxiway S — limited
Low

From 13 Oct 2026 1304Z to 31 Jan 2027 2359Z · NOTAM 10/063 · ICAO A2178/26

TWY S BTN MAINT RAMP AND TWY C NONMOVEMENT AREA

!AUS 10/063 AUS TWY S BTN MAINT RAMP AND TWY C NONMOVEMENT AREA 2610131304-2701312359

Approach & navaids · 3 active

Runway 18R — ILS unserviceable
Medium

From 28 Oct 2026 1350Z to 6 Nov 2026 2000Z (estimated) · NOTAM 10/129 · ICAO A2256/26

NAV ILS RWY 18R U/S

!AUS 10/129 AUS NAV ILS RWY 18R U/S 2610281350-2611062000EST
Runway 18L — unserviceable
Medium

From 1 Apr 2026 1138Z to 19 Nov 2027 2111Z (estimated) · NOTAM 04/008 · ICAO A0722/26

NAV ILS RWY 18L IM U/S

!AUS 04/008 AUS NAV ILS RWY 18L IM U/S 2604011138-2711192111EST
Runway 18L — locator
Low

From 5 Nov 2026 0900Z to 5 Nov 2026 1800Z · NOTAM 11/024 · ICAO A2290/26

NAV ILS RWY 18L CAT II NA

!AUS 11/024 AUS NAV ILS RWY 18L CAT II NA 2611050900-2611051800

Lighting · 2 active

Runway 18L — approach lighting unserviceable
Medium

From 5 Nov 2026 0900Z to 5 Nov 2026 1800Z · NOTAM 11/023 · ICAO A2289/26

RWY 18L ALS U/S

!AUS 11/023 AUS RWY 18L ALS U/S 2611050900-2611051800
Aerodrome beacon
Low

From 27 Aug 2026 1820Z to 30 Nov 2026 2359Z · NOTAM 08/110 · ICAO A1928/26

AD AP ABN ON CONS

!AUS 08/110 AUS AD AP ABN ON CONS 2608271820-2611302359

Airspace · 2 active

Drone operations
Low

From 20 Jan 2026 1300Z to 29 Dec 2026 2300Z · NOTAM 01/058

AIRSPACE UAS WI AN AREA DEFINED AS .58NM RADIUS OF AUS SFC-200FT AGL TUE 1300-2300

!AUS 01/058 AUS AIRSPACE UAS WI AN AREA DEFINED AS .58NM RADIUS OF AUS SFC-200FT AGL TUE 1300-2300 2601201300-2612292300
Drone operations
Low

From 31 Jul 2026 0000Z to 31 Dec 2026 2359Z · NOTAM 07/166

AIRSPACE UAS WI AN AREA DEFINED AS 0.9NM RADIUS OF 301259N0973602W (3.8NM ENE AUS) SFC-200FT AGL

!AUS 07/166 AUS AIRSPACE UAS WI AN AREA DEFINED AS 0.9NM RADIUS OF 301259N0973602W (3.8NM ENE AUS) SFC-200FT AGL DLY 0000-2359 2607310000-2612312359

Obstacles · 11 active

Tower lights — unserviceable
Medium

From 14 Oct 2026 0024Z to 14 Nov 2026 2359Z · NOTAM 10/068

OBST TOWER LGT (ASR 1051749) 301421.00N0973742.00W (3.4NM NE AUS) 839.9FT (399.9FT AGL) U/S

!AUS 10/068 AUS OBST TOWER LGT (ASR 1051749) 301421.00N0973742.00W (3.4NM NE AUS) 839.9FT (399.9FT AGL) U/S 2610140024-2611142359
Tower lights — unserviceable
Medium

From 2 Oct 2026 1244Z to 31 Dec 2026 0400Z · NOTAM 10/010

OBST TOWER LGT (ASR 1227106) 300426.00N0973354.00W (9.0NM SE AUS) 772.0FT (310.0FT AGL) U/S

!AUS 10/010 AUS OBST TOWER LGT (ASR 1227106) 300426.00N0973354.00W (9.0NM SE AUS) 772.0FT (310.0FT AGL) U/S 2610021244-2612310400
Tower lights — unserviceable
Medium

From 26 Oct 2026 1532Z to 24 Jan 2027 1632Z · NOTAM 10/114

OBST TOWER LGT (ASR 1002944) 300727.00N0972602.00W (13.0NM ESE AUS) 732.0FT (253.9FT AGL) U/S

!AUS 10/114 AUS OBST TOWER LGT (ASR 1002944) 300727.00N0972602.00W (13.0NM ESE AUS) 732.0FT (253.9FT AGL) U/S 2610261532-2701241632
Tower lights — unserviceable
Low

From 29 May 2026 1834Z to 1 Dec 2026 0559Z · NOTAM 05/190 · ICAO A1353/26

OBST TOWER LGT (ASR UNKNOWN) 301311.00N0974020.00W (1.5NM N AUS) 641FT (100FT AGL) U/S

!AUS 05/190 AUS OBST TOWER LGT (ASR UNKNOWN) 301311.00N0974020.00W (1.5NM N AUS) 641FT (100FT AGL) U/S 2605291834-2612010559
Obstacle lights — unserviceable
Low

From 29 May 2026 1901Z to 1 Dec 2026 0559Z · NOTAM 05/191 · ICAO A1354/26

OBST TOWER LGT (ASR UNKNOWN) 301320.00N0974047.00 (1.7NM NW AUS) 641FT (100FT AGL) U/S

!AUS 05/191 AUS OBST TOWER LGT (ASR UNKNOWN) 301320.00N0974047.00 (1.7NM NW AUS) 641FT (100FT AGL) U/S 2605291901-2612010559
Crane — erected
Low

From 11 Feb 2026 2050Z to 21 Feb 2027 0559Z · NOTAM 02/065 · ICAO A0306/26

OBST CRANE (ASN UNKNOWN) 301137N0973958W (0.17NM SE AUS) 789FT (150FT AGL) FLAGGED AND LGTD

!AUS 02/065 AUS OBST CRANE (ASN UNKNOWN) 301137N0973958W (0.17NM SE AUS) 
 789FT (150FT AGL) FLAGGED AND LGTD 2602112050-2702210559
Crane — 719 ft MSL (186 ft AGL)
Low

From 22 Sep 2026 1926Z to 31 Mar 2027 2359Z · NOTAM 09/094 · ICAO A2073/26

OBST CRANE (ASN 2026-ASW-4572-OE) 301225N0974107W (1.1NM NW AUS) 719FT (186FT AGL) FLAGGED AND LGTD

!AUS 09/094 AUS OBST CRANE (ASN 2026-ASW-4572-OE) 301225N0974107W (1.1NM NW AUS) 719FT (186FT AGL) FLAGGED AND LGTD 2609221926-2703312359
Crane — 783 ft MSL (230 ft AGL)
Low

From 6 Dec 2025 2210Z to 2 Apr 2027 0459Z · NOTAM 12/040 · ICAO A2289/25

OBST CRANE (ASN 2025-ASW-8939-OE) 301231N0974129W (1.4NM NW AUS) 783FT (230FT AGL) FLAGGED AND LGTD

!AUS 12/040 AUS OBST CRANE (ASN 2025-ASW-8939-OE) 301231N0974129W (1.4NM NW AUS) 783FT (230FT AGL) FLAGGED AND LGTD 2512062210-2704020459
Crane — 726 ft MSL (226 ft AGL)
Low

From 27 May 2026 1639Z to 18 May 2027 2300Z · NOTAM 05/170 · ICAO A1315/26

OBST CRANE (ASN 2025-ASW-12550-OE) 301329N0974154W (2.3NM NW AUS) 726FT (226FT AGL) FLAGGED AND LGTD

!AUS 05/170 AUS OBST CRANE (ASN 2025-ASW-12550-OE) 301329N0974154W (2.3NM NW AUS) 726FT (226FT AGL) FLAGGED AND LGTD 2605271639-2705182300
Crane — 767 ft MSL (260 ft AGL)
Low

From 22 Sep 2026 1713Z to 31 May 2027 2359Z · NOTAM 09/090 · ICAO A2069/26

OBST CRANE (ASN 2025-ASW-1383-NRA) 301222N0974008W (0.7NM NE AUS) 767FT (260FT AGL) FLAGGED AND LGTD

!AUS 09/090 AUS OBST CRANE (ASN 2025-ASW-1383-NRA) 301222N0974008W (0.7NM NE AUS) 767FT (260FT AGL) FLAGGED AND LGTD 2609221713-2705312359
Crane — 584 ft MSL (121 ft AGL)
Low

From 30 Oct 2026 1154Z to 1 Jun 2027 2359Z · NOTAM 10/133 · ICAO A2266/26

OBST CRANE (ASN 2026-ASW-3929-NRA) 301112N0973848W (1.3NM ESE AUS) 584FT (121FT AGL) FLAGGED

!AUS 10/133 AUS OBST CRANE (ASN 2026-ASW-3929-NRA) 301112N0973848W (1.3NM ESE AUS) 584FT (121FT AGL) FLAGGED 2610301154-2706012359

Procedures · 7 active

Departure AUSTINE SEVEN DEPARTURE changed
Medium

From 5 Nov 2026 1500Z to 5 Nov 2026 1930Z · NOTAM 6/5725 · ICAO A2294/26 · FDC

SID AUSTIN-BERGSTROM INTL, AUSTIN, TX. AUSTINE SEVEN DEPARTURE ... STONEWALL TRANSITION NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS. SAN ANTONIO TRANSITION DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS, STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST

!FDC 6/5725 AUS SID AUSTIN-BERGSTROM INTL, AUSTIN, TX.
AUSTINE SEVEN DEPARTURE ...
STONEWALL TRANSITION NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS.
SAN ANTONIO TRANSITION DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST
Approach ILS OR LOC RWY 36L changed
Medium

From 5 Nov 2026 1500Z to 5 Nov 2026 1930Z · NOTAM 6/5726 · ICAO A2295/26 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. ILS OR LOC RWY 36L, AMDT 7... DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS, STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST

!FDC 6/5726 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
ILS OR LOC RWY 36L, AMDT 7...
DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST
Approach ILS OR LOC RWY 18R changed
Medium

From 5 Nov 2026 1500Z to 5 Nov 2026 1930Z · NOTAM 6/5717 · ICAO A2293/26 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. ILS OR LOC RWY 18R, AMDT 6... DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS, STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST

!FDC 6/5717 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
ILS OR LOC RWY 18R, AMDT 6...
DME REQUIRED EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
STV VORTAC OUT OF SERVICE. 2611051500-2611051930EST
Approach RNAV (GPS) Y RWY 18R changed
Medium

From 27 Oct 2026 1225Z to 25 Nov 2026 1225Z (estimated) · NOTAM 6/2659 · ICAO 10/2241 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. RNAV (GPS) Y RWY 18R, AMDT 3B... LNAV/VNAV DA 906/HAT 364 ALL CATS. FOR INOP ALS, INCREASE LNAV/VNAV ALL CATS VISIBILITY TO RVR 5500; AND LNAV CAT E VISIBILITY TO RVR 5500. EXCEPT WHEN ADVISED BY ATCT THAT THIS CRANE IS DOWN. TEMPORARY CRANES, 695 MSL, 2965FT SW OF RWY 18R (2026-ASW-4159-OE). 2610271225-2611251225EST

!FDC 6/2659 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
RNAV (GPS) Y RWY 18R, AMDT 3B...
LNAV/VNAV DA 906/HAT 364 ALL CATS.
FOR INOP ALS, INCREASE LNAV/VNAV ALL CATS VISIBILITY TO RVR 5500; AND LNAV CAT E VISIBILITY TO RVR 5500.
EXCEPT WHEN ADVISED BY ATCT THAT THIS CRANE IS DOWN.
TEMPORARY CRANES, 695 MSL, 2965FT SW OF RWY 18R (2026-ASW-4159-OE).
2610271225-2611251225EST
Approach RNAV (RNP) Z RWY 18L changed
Medium

From 9 Sep 2026 1031Z to 21 Apr 2027 1031Z (estimated) · NOTAM 6/1863 · ICAO A1975/26 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. RNAV (RNP) Z RWY 18L, AMDT 2... RNP 0.24 DA NA. RNP 0.30 DA 939/HAT 447 ALL CATS. VIS RVR 4500 ALL CATS. FOR INOP ALS, INCREASE RNP 0.30 ALL CATS VISIBILITY TO 1 3/8 SM. TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 2898FT WEST OF RWY 18L (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA). 2609091031-2704211031EST

!FDC 6/1863 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
RNAV (RNP) Z RWY 18L, AMDT 2...
RNP 0.24 DA NA.
RNP 0.30 DA 939/HAT 447 ALL CATS. VIS RVR 4500 ALL CATS.
FOR INOP ALS, INCREASE RNP 0.30 ALL CATS VISIBILITY TO 1 3/8 SM.
TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 2898FT WEST OF RWY 18L (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA).
2609091031-2704211031EST
Approach RNAV (GPS) Y RWY 18L changed
Medium

From 9 Sep 2026 1031Z to 21 Apr 2027 1031Z (estimated) · NOTAM 6/1865 · ICAO A1973/26 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. RNAV (GPS) Y RWY 18L, AMDT 3B... LNAV/VNAV DA 978 HAT 486 ALL CATS. VIS RVR 5000 ALL CATS. LNAV MDA 1080/HAT 588 ALL CATS. VIS CATS C/D/E 1 1/4. VDP 1.61 NM TO RW18L. FOR INOP ALS, INCREASE LPV CAT E VISIBILITY TO RVR 4000, LNAV/VNAV ALL CATS VISIBILITY TO 1 3/8 SM, AND LNAV CATS C D E VISIBILITY TO 1 3/4 SM. TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 2898FT WEST OF RWY 18L (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA). 2609091031-2704211031EST

!FDC 6/1865 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
RNAV (GPS) Y RWY 18L, AMDT 3B...
LNAV/VNAV DA 978 HAT 486 ALL CATS. VIS RVR 5000 ALL CATS.
LNAV MDA 1080/HAT 588 ALL CATS. VIS CATS C/D/E 1 1/4.
VDP 1.61 NM TO RW18L.
FOR INOP ALS, INCREASE LPV CAT E VISIBILITY TO RVR 4000, LNAV/VNAV ALL CATS VISIBILITY TO 1 3/8 SM, AND LNAV CATS C D E VISIBILITY TO 1 3/4 SM.
TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 2898FT WEST OF RWY 18L (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA).
2609091031-2704211031EST
Approach ILS OR LOC RWY 18L changed
Medium

From 9 Sep 2026 1031Z to 21 Apr 2027 1031Z (estimated) · NOTAM 6/1864 · ICAO A1974/26 · FDC

IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX. ILS OR LOC RWY 18L, AMDT 4B... ILS OR LOC RWY 36R, AMDT 4D... RNAV (GPS) Y RWY 18L, AMDT 3B... RNAV (GPS) Y RWY 18R, AMDT 3B... RNAV (GPS) Y RWY 36L, AMDT 3B... RNAV (GPS) Y RWY 36R, AMDT 2C... CIRCLING CAT A MDA 1120/HAA 578. TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 4082FT NORTH OF KAUS AIRPORT (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA). 2609091031-2704211031EST

!FDC 6/1864 AUS IAP AUSTIN-BERGSTROM INTL, AUSTIN, TX.
ILS OR LOC RWY 18L, AMDT 4B...
ILS OR LOC RWY 36R, AMDT 4D...
RNAV (GPS) Y RWY 18L, AMDT 3B...
RNAV (GPS) Y RWY 18R, AMDT 3B...
RNAV (GPS) Y RWY 36L, AMDT 3B...
RNAV (GPS) Y RWY 36R, AMDT 2C...
CIRCLING CAT A MDA 1120/HAA 578.
TEMPORARY CRANES, UP TO 767 MSL, BEGINNING 4082FT NORTH OF KAUS AIRPORT (2025-ASW-1382 THRU 1383-NRA, 2025-ASW-1402 THRU 1405-NRA).
2609091031-2704211031EST

NOTAMs are shown for planning. Always confirm with an official preflight briefing.

Frequently asked

Are there any NOTAMs at KAUS right now?

Austin-Bergstrom International has 35 active NOTAMs, 1 of them affecting runways, 1 of high significance.

What is a NOTAM?

A Notice to Air Missions is a filed notice of a temporary condition a pilot needs to know about: a closed runway or taxiway, an out-of-service navaid or approach light, a crane near the approach path, or restricted airspace. Checking them is a required part of preflight action under 14 CFR 91.103.

What is an FDC NOTAM?

A Flight Data Center NOTAM is issued by the FAA rather than the airport, and covers regulatory matters: amendments to instrument approach procedures, changes to charted minimums, and temporary flight restrictions.

More about KAUS

NOTAMs from the FAA NOTAM service. Times are UTC (Zulu). For planning and education only — NOTAM review is required preflight action under 14 CFR 91.103 and must be done through an official source.

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