# Service difficulty reports: JASC 7800 A list on [JASC 7800](https://openairdocs.org/jasc/7800.md). Reports filed under 7800 · Engine Exhaust System, newest first. Page 1 of 6 · 281 reports - [SDR 2026FA0000037](https://openairdocs.org/sdr/2026FA0000037.md): Channel · cracked · Jan 19, 2026 · N407EG · Boeing 76733A > DURING MAINTENANCE INSPECTIONS AT IAI FACILITIES SHOP FOUND A CRACK ON CHANNEL. DAMAGED AND ENLARGED FASTENER HOLES ON OUTER SKIN FAIRING. WORK PERFORMED IAW REA MF03036R0216. - [SDR 2025FA0000514](https://openairdocs.org/sdr/2025FA0000514.md): Exhaust Pipe · inflt separation · Jul 23, 2025 · N350TS · Diamon DA42 > HEATSHIELD IS LOOSE ON THE EXHAUST PIPE TTSN 31.9 HOURS - [SDR ENHA20250522001](https://openairdocs.org/sdr/ENHA20250522001.md): Muffler · leaking · May 21, 2025 · N207YH · Cessna 207A > PILOT REPORTED CO DETECTOR INDICATING. MECHANICS FOUND THE RIGHT HAND MUFFLER COUPLING LEAKING. MECHANICS REPLACED THE ATTACHING HARDWARE. - [SDR 2025FA0000270](https://openairdocs.org/sdr/2025FA0000270.md): Exhaust Pipe · separated · Apr 15, 2025 · N350TS · Diamon DA42 > AD2018-10-10 DATED JUNE 12 2018 REQUIRES THE HEAT SHIELD TO BE TIGHT ON THE AND WELDED TO THE EXHAUST PIPE. THE HEAT SHIELD SPOT WELDS FAILED AND VERY LOOSE ON THE EXHAUST PIPE. THE AD IS SUGGESTING THE PIPE SHOULD LAST AT LEAST 1500.0 HOURS BUT FAILED AT 16.9 - [SDR 2025FA0000269](https://openairdocs.org/sdr/2025FA0000269.md): Exhaust Pipe · separated · Apr 15, 2025 · N350TS · Diamon DA42 > AD2018-10-10 DATED JUNE 12 2018 REQUIRES THE HEAT SHIELD TO BE TIGHT ON THE AND WELDED TO THE EXHAUST PIPE. THE HEAT SHIELD SPOT WELDS FAILED AND VERY LOOSE ON THE EXHAUST PIPE. THE AD IS SUGGESTING THE PIPE SHOULD LAST AT;LEAST 1500.0 HOURS BUT FAILED AT 145 - [SDR 2025FA0000268](https://openairdocs.org/sdr/2025FA0000268.md): Exhaust Pipe · separated · Apr 15, 2025 · N350TS · Diamon DA42 > AD2018-10-10 DATED JUNE 12 2018 REQUIRES THE HEAT SHIELD TO BE TIGHT ON THE AND WELDED TO THE EXHAUST PIPE. THE HEAT SHIELD SPOT WELDS FAILED AND VERY LOOSE ON THE EXHAUST PIPE. THE AD IS SUGGESTING THE PIPE SHOULD LAST AT;LEAST 1500.0 HOURS BUT FAILED AT 23. - [SDR 2025FA0000134](https://openairdocs.org/sdr/2025FA0000134.md): Muffler · cracked · Feb 26, 2025 · N578CA · Cessna 172S > CREW REPORTS EXHAUST SMELL IN CABIN. VISUAL INSPECTION FOUND MUFFLER CRACKED. - [SDR VNAA202408070007](https://openairdocs.org/sdr/VNAA202408070007.md): Coaming · cracked · Aug 7, 2024 · N719PS · Cndair CL6002C10 > RH UPPER TRANSCOWL LATCH COAMING IS CRACKED. REMOVED AND REPLACED COAMING IAW MHIRJ REO 670-54-21-1647 REV -A DATED 2024-06-17." - [SDR SWAA2024071512651](https://openairdocs.org/sdr/SWAA2024071512651.md): Tailpipe · fire · Jul 14, 2024 · N7720F · Boeing 7377BD > TAIL PIPE FIRE ENGINE #1. EXTINGUISHED ON ITS OWN<[01] INSPECTED #1 ENGINE INLET & EXHAUST. FOUND OIL ACCUMULATION IN CENTER EXHAUST PLUG CAVITY. NO OTHER DEFECTS NOTED. OILE CONSUMPTION & PSI ARE WITHIN NORMAL LIMITS. REF FIM 71-05 TASK 811. POWERPLANT ENGINE - [SDR MK1Y20240602008](https://openairdocs.org/sdr/MK1Y20240602008.md): Sleeve · unknown · Jun 2, 2024 · N447CM · Boeing 767330 > REPAIR - ENG #2, PW4060, PRIMARY EXHAUST SLEEVE. - [SDR SWAA2024042477722](https://openairdocs.org/sdr/SWAA2024042477722.md): Tube · leaking · Apr 21, 2024 · N8710M · Boeing 7378 > DECLARED EMERGENCY, SUSPECT LEAK #1 ENGINE<[01] R&R CENTER VENT TUBE EXTENSION AND MIXER IAW AMM 78-11-03 AND REMOVED AND REINSTALLED AFT PLUG IAW AMM 78-11-02. - [SDR SWAA2024042478765](https://openairdocs.org/sdr/SWAA2024042478765.md): Mixing Unit · leaking · Apr 21, 2024 · N8710M · Boeing 7378 > DECLARED EMERGENCY, SUSPECT LEAK #1 ENGINE<[01] R&R CENTER VENT TUBE EXTENSION AND MIXER IAW AMM 78-11-03 AND REMOVED AND REINSTALLED AFT PLUG IAW AMM 78-11-02. - [SDR SWAA2024042478766](https://openairdocs.org/sdr/SWAA2024042478766.md): Plug · leaking · Apr 21, 2024 · N8710M · Boeing 7378 > DECLARED EMERGENCY, SUSPECT LEAK #1 ENGINE<[01] R&R CENTER VENT TUBE EXTENSION AND MIXER IAW AMM 78-11-03 AND REMOVED AND REINSTALLED AFT PLUG IAW AMM 78-11-02. - [SDR CALA2024010800052](https://openairdocs.org/sdr/CALA2024010800052.md): Unknown · unknown · Jan 4, 2024 · N58101 · Boeing 757224 > AFTER POWER UP ON T/O ROLL-MOMENTARY RT ENG REVERSER LIGHT-RTO COMPLIED WITH DDP DDP COMPLIED WITH DISPATCH DESK: 24 NAME: DS DATE: 04-JAN-24- NOC DESK: 757 NAME: MC DATE: 04-JAN-24- RIGHT REVERSER INOP. CYCLED THRUST REV. 6 TIMES AND COULD NOT DUPLICATE FAULT - [SDR CALA2023111603401](https://openairdocs.org/sdr/CALA2023111603401.md): Unknown · unknown · Nov 14, 2023 · N77865 · Boeing 757324 > DURING T/O ROLL AFTER T/O THRUST APPLIED HAD MOMENTARY RIGHT THRUST REV LIGHT. ACCOMPLISHED #2 ENGINE THRUST REVERSER DEACTIVATION PER MEL CARD AS REQUIRED. REQUESTING MEL. PLACARD APPLIED TO INST PANEL. 78005 AND AMM 78-31-00-201. CB ON P11 AND P6 PULLED AND - [SDR CALA2023111603405](https://openairdocs.org/sdr/CALA2023111603405.md): Unknown · unknown · Nov 13, 2023 · N58101 · Boeing 757224 > RIGHT REVERSER AMBER LIGHT ILLUMINATED AT 115KTS ON TAKEOFF FOUND NO MESSAGE UNDER STATUS PAGE OR UNDER ECS/MSG ON P61. PERFORMED T/R OPERATIONAL CHECKS IAW 78-30-00-715-037-R04 WITH NO DEFECTS NOTED. PERFORMED TASK MULTIPLE TIMES WITH SAME RESULTS. INSPECTED - [SDR 2023FA0000677](https://openairdocs.org/sdr/2023FA0000677.md): Unknown · unknown · Oct 25, 2023 · N290CM · Boeing 767381 > FOUND EXISTING DOUBLER REPAIR ON ENGINE #1 PRIMARY EXHAUST SKIN AT LH SIDE. - [SDR 2023FA0000659](https://openairdocs.org/sdr/2023FA0000659.md): Unknown · unknown · Oct 22, 2023 · N278CM · Boeing 76738E > ENG #1 EXHAUST OUTER SLEEVE S/N 0468-A P/N 015T0305-10: NRC M0769 DENT WITH SHARP CREASE IN THE OUTER EXHAUST SKIN LOCATED BT 7-8 O’CLOCK AND BT NAS STA 331.47-337.32. DENT SIZE: 2.42”(A)X0.125(Y) A=2.42” Y=0.125” A/Y RATIO 19.3. - [SDR 2023FA0000654](https://openairdocs.org/sdr/2023FA0000654.md): Unknown · unknown · Oct 22, 2023 · N278CM · Boeing 76738E > DURING MAINTENANCE INSPECTION SHOP FOUND ON ENG #1, THRUST REVERSER, AT JUNCTION OF TWO (2) PANELS, LOWER REAR PART, MISSING FILLER MATERIAL. DAMAGES DIMENSIONS: LENGTH: 2.6”, WIDTH: 1.2”. - [SDR 2023FA0000646](https://openairdocs.org/sdr/2023FA0000646.md): Unknown · unknown · Oct 22, 2023 · N278CM · Boeing 76738E > DURING MAINTENANCE INSPECTION SHOP FOUND ON ENG #1, THRUST REVERSER, AT JUCTION OF BOTH SIDE OF C-DUCT, LOWER REAR PARTS, MISSING FILLER MATERIAL. DAMAGES DIMENSIONS: LENGTH: 3”, WIDTH: 1”. - [SDR CALA2023102503168](https://openairdocs.org/sdr/CALA2023102503168.md): Actuator · faulty · Oct 10, 2023 · N57869 · Boeing 757324 > L REV CAUTION ON TAKEOFF.REV CAUTION OUT AFTER THROTTLE RETARDED MEL TO BE APPLIED WITH TOMC APPROVEL REV ISOL VALVE PIN INSTALLED, MECH DEACT PINS INSTALLED, LEFT ENG SYNC LOCK P11 PULLED AND SAFETIED. PLACARD INSTALLED FWD OF THROTTLE THRUST REV INOP PERF - [SDR YV3R2023082800578](https://openairdocs.org/sdr/YV3R2023082800578.md): Shield · cracked · Aug 25, 2023 · Robsin R44RAVENII > CUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-1 WAS FOUND CRACKED.. - [SDR JJBA20230823021](https://openairdocs.org/sdr/JJBA20230823021.md): Unknown · unknown · Jul 13, 2023 · N11192 · Emb EMB145XR > AT LH TR ASSY, AFT OUTBD SIDE, CORROSION SUSPECTED UNDER SKIN. LH TR ASSY REMOVED AND REPLACED. OPS CHECK SAT. - [SDR ENHA LP233910](https://openairdocs.org/sdr/ENHA%20LP233910.md): Seal · leaking · May 19, 2023 · N14AP · Piper PA31350 > LEFT ENGINE BLUBBERED THEN DIED WHILE TURNING AROUND TO TAKEOFF. MECHANICS FOUND #1 CYLINDER SPARK PLUGS FOULED AND WET WITH GAS. MECHANICS REPLACED ALL PARK PLUGS ON LEFT HAND ENGINE. MECHANICS FOUND #1 INTAKE TUBE O-RING PINCHED AND ROLLED, MECHANICS REPLAC - [SDR YV3R2023061400570](https://openairdocs.org/sdr/YV3R2023061400570.md): Shield · cracked · May 18, 2023 · Robsin R44 > CUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-1 WAS FOUND CRACKED. - [SDR UIEA2023051000446](https://openairdocs.org/sdr/UIEA2023051000446.md): Duct · unknown · May 13, 2023 · N429MC · Boeing 747481 > NO.1 ENG LH C-DUCT FWD V BLADE UPPER AREA CRACK(

C-DUCT REPLACED AS PER AMM 78-31-01 REV 107 DATE: 15 MAR 2023.

) - [SDR YV3R2023051600568](https://openairdocs.org/sdr/YV3R2023051600568.md): Shield · cracked · May 10, 2023 · Robsin R44RAVENII > CUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-2 WAS FOUND CRACKED. - [SDR ABXA2023042467](https://openairdocs.org/sdr/ABXA2023042467.md): Unknown · unknown · Apr 23, 2023 · N750AX · Boeing 767232 > LH REV ISLN VLV MSG DISPLAYED,DURING, LH ENG START. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE DEFERRED THE L/H T/R IAW MEL 78-31-1A. MX PROCEDURES C/W. PLACARD INSTALLED. AIRCRAFT RETURNED TO SERVICE. - [SDR CALA2023041201105](https://openairdocs.org/sdr/CALA2023041201105.md): Thrust Reverser · unknown · Apr 12, 2023 · N776UA · Boeing 777222 > PDA 3 #1 ENGINE THRUST REVERSER O/B AFT UPPER SIDE HAS 9 FASTENERS MISSING. SEE PHOTO. ADDED PHOTO. INSTALLED NEW FASTENERS REF. SRM 51-40-02, NO DAMAGE TO PANEL NOTED, OK FOR SERVICE. - [SDR UIEA2023040300304](https://openairdocs.org/sdr/UIEA2023040300304.md): Switch · unknown · Apr 2, 2023 · N415MC · Boeing 74747UF > ON TAKE-OFF, N1 ON #1 ENGINE ONLY PRODUCED 42% THRUST(

FOUND #1 THRUST REVERSER POSITION FEEDBACK SENSOR OUT OF ADJUSTMENT READING 28.0. ADJUSTED IAW B747-700 AMM 78-34-10. READING 0.0 NOW. DIRECTLY RELATED TO DMI 182884 ON LP 1777901 P1 PER MEL 78-31-01A CA - [SDR HALA2023032100009](https://openairdocs.org/sdr/HALA2023032100009.md): Unknown · unknown · Mar 21, 2023 · N217HA · Airbus A321271N > REPORTED #1 ENGINE TAILPIPE FIRE. ACCOMPLISHED AMM 72-00-00-210-817-A. VISUAL INSPECTION OF ENG AFTER FIRE NO DEFECTA NOTED. - [SDR 2023FA0000201](https://openairdocs.org/sdr/2023FA0000201.md): Muffler · failed · Mar 11, 2023 · N74808 · Robsin R44RAVENII > CARBON MONOXIDE INDICATION ON ON MAP DISPLAY ON FOREFLIGHT FROM SENTRY PLUS ADS-B RECEIVER. IMMEDIATELY CAME ON WHEN HEAT WAS PULLED ON. TURNED OFF HEAT, OPENED ALL VENTS AND VERIFIED THE SENTRY RETURNED TO NORMAL. SCHEDULE AN INSPECTION WHICH DISCOVERED A HO - [SDR UIEA2023022400192](https://openairdocs.org/sdr/UIEA2023022400192.md): None · none · Feb 28, 2023 · N404KZ · Boeing 747481F > NO.4 ENG LH T/R OPEN ACTUATOR ATT POINT BOLT HOLE FOUND ELONGATED.(

NO.4 ENG LH T/R OPEN ACTUATOR ATT POINT REPAIRED IAW CMM 78-32-02 REV.62

) - [SDR UIEA2023022200175](https://openairdocs.org/sdr/UIEA2023022200175.md): Support Ring · none · Feb 28, 2023 · N404KZ · Boeing 747481F > NO.4 ENG L/H T/R AFT CASCADE SUPPORT RING 11 O'CLOCK FOUND CRACK FORWARD OF BOLT HOLE.(

SUPPORT RING REPLACEMENT CARRIED OUT AS PER ATLAS AIR EO: 1978A084 REV.3 PART 1.

) - [SDR UIEA2023022000142](https://openairdocs.org/sdr/UIEA2023022000142.md): None · none · Feb 28, 2023 · N404KZ · Boeing 747481F > NO.3 ENG L/H T/R IDG SERVICE DOOR AFT 2EA LATCH ATT SKIN FOUND WEAR.(

2EA WEAR SKIN AREA REPAIRED AS PER ST ENGINEERING CMM 78-32-02 REPAIR 45.

) - [SDR IXXA2023040303](https://openairdocs.org/sdr/IXXA2023040303.md): Rib · gouged · Feb 23, 2023 · N367AZ · Boeing 767319 > #2 ENGINE OUTBOARD THRUST REVERSER INSIDE FWD STIFFENER GOUGED - [SDR YV3R2023031500553](https://openairdocs.org/sdr/YV3R2023031500553.md): Shield · cracked · Feb 16, 2023 · Robsin R44RAVENII > CUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-2 CRACKED. - [SDR SROM110220222](https://openairdocs.org/sdr/SROM110220222.md): None · cracked · Nov 2, 2022 · N794CP · Bombdr DHC8402 > LH NACELLE EXHAUST SHROUD SPRING CLIPS CRACKED AT 2 LOCATIONS (P/N 8Z9029-103). CRACKS ARE OUTSIDE OF MANUFACTURES LIMITS REQUIRING PART REPLACEMENT. - [SDR UIEA2022102201169](https://openairdocs.org/sdr/UIEA2022102201169.md): None · none · Oct 24, 2022 · N1013A · Boeing 767 > THREE DENTS ON ENGINE #2 PRIMARY EXHAUST OUTER SKIN BETWEEN 6/8 O´CLOCK AND BETWEEN NAC STA 323.42/344.67(

WELD FILL REPAIR IAW BOEING MSG: CMA-TLS-22-0022-02B

) - [SDR CALA2022102402930](https://openairdocs.org/sdr/CALA2022102402930.md): None · missing · Oct 24, 2022 · N848UA · Airbus A319131 > PDA 3 FOUND ON WALK AROUND: #1 ENGINE COMMON EXHAUST NOZZLE APPOX 1 O''CLOCK IS MISSING METAL. SEE PICS ADDED PICS ADD PIC REMOVED NUMBER 1 ENG COMMON NOZZLE ASSEMBLY REF AMM 71-11-11-00-010A. REMOVED AND REPLACED CNA ASSY REF AMM 78-11-11 ALL CHECKS GOOD AT T - [SDR 2022FA0000618](https://openairdocs.org/sdr/2022FA0000618.md): Muffler · cracked · Oct 21, 2022 · N7374E · Cessna 172N > NEWLY "OVERHAULED" MUFFLER CRACKED AFTER ONLY 81.3 HOURS OF OPERATION. VISIBLE INDICATION OF FAILURE WAS EXHAUST SOOT ON THE EXTERIOR OF THE MUFFLER SHROUD. MUFFLER WAS SOLD AS OVERHAULED WITH FORM 8130-3 AND WORK ORDER WHILE ALL PARTS APPEARED TO BE MANUFACTU - [SDR CALA2022091402347](https://openairdocs.org/sdr/CALA2022091402347.md): None · none · Sep 14, 2022 · N78866 · Boeing 757 > REVERSER UNLOCK INDICATI ON DURING TAKEOFF. REJ ECTED AT AROUND 100KTS. BTS GOT TO 4 AT HIGHEST DEACTIVATED AND SECURED LEFT ENGINE THRUST REVERSER PER MEL DDP IS COMPLIED WITH, PLACED MEL. 7831E. REQUEST MEL. DISPATCH DESK: 3316 NAME: DUY DATE: 08-SEP-22- NO - [SDR CALA2022091202343](https://openairdocs.org/sdr/CALA2022091202343.md): Eec · inoperative · Sep 12, 2022 · N815UA · Airbus A300* > PILOT REPORTS E1 REV FAULT. DIVERSION INTO BNA. THRUST REVERSER HAS BEEN DEACTIVATED AND SECURED IN THE FWD THRUST (STOWED AND LOCKED) POSITION. REMOVED AND REPLACED #1 ENGINE EEC. ACCP IDT INSPECTION OF EEC INSTALLATION SAFETY AND SECURITY. IDT EEC OP CHK PAS - [SDR CALA2022091202338](https://openairdocs.org/sdr/CALA2022091202338.md): None · missing · Sep 12, 2022 · N12218 · Boeing 737 > PDA 3 #2 ENG PRIMARY EXH NOZZLE OUTBD SIDE FWD FENCE HAS ELONGATED HOLES IN NOZZLE ITSELF AND THE FENCE AND MISSING HI-LICK FASTENER. REMOVED AND REPLACED PRIMARY NOZZLE. - [SDR SWIA202266633](https://openairdocs.org/sdr/SWIA202266633.md): None · chafed · Sep 7, 2022 · N779SK · Cndair CL6002C10 > L/H UPPER TRANSCOWL COAMING IS CHAFED AT FWD EDGE. (C-CHECK RO 10/24/2022) PERMANENTLY REPAIRED L/H UPPER TRANSCOWL COAMING AT FWD EDGE REF GENERIC REO #670-54-21-1028 REV (NC) 2009-06-15 STEPS 1-9. COMPLIED WITH SKY CARD 51-900-1002-SKY. - [SDR SWIA202266632](https://openairdocs.org/sdr/SWIA202266632.md): None · chafed · Sep 7, 2022 · N779SK · Cndair CL6002C10 > L/H LOWER TRANSCOWL COAMING IS CHAFED AT FWD EDGE. (C-CHECK RO 10/24/2022) COMPLIED WITH REO REPAIR REF REO 670-54-21-1028 DATED 2009-06-15 REV NC. COMPLIED WITH 51-900-1002-SKY. ALL CHECKS GOOD - [SDR SWIA202266631](https://openairdocs.org/sdr/SWIA202266631.md): None · chafed · Sep 7, 2022 · N779SK · Cndair CL6002C10 > R/H LOWER TRANSCOWL COAMING CHAFED AT FWD EDGE. (C-CHECK RO 10/24/2022) REPAIRED R/H LOWER TRANSCOWL COAMING AT FWD EDGE. REF REO 670-54-21-1028, REV. NC, DATED 2009-06-15. CHECKS GOOD. COMPLIED WITH SKYWEST TASK CARD 51-900-1002-SKY. - [SDR SWIA202266630](https://openairdocs.org/sdr/SWIA202266630.md): None · worn · Sep 7, 2022 · N779SK · Cndair CL6002C10 > R/H LOWER TRANSCOWL FWD AND AFT LATCH BEARING PADS ARE WORN. (C-CHECK RO 10/24/2022) REMOVED AND REPLACED FWD. AND AFT. LATCH BEARING PADS P/N CN624-2130-201. UPON REMOVAL FOUND AFT. C-CHANNEL STIFFENER TO BE WORN. REMOVED AND REPLACED C-CHANNEL STIFFEN - [SDR SWIA202266629](https://openairdocs.org/sdr/SWIA202266629.md): None · chafed · Sep 7, 2022 · N779SK · Cndair CL6002C10 > R/H UPPER TRANSCOWL COAMING CHAFED AT FWD EDGE. (C-CHECK RO 10/24/2022) REPAIRED R/H UPPER TRANSCOWL COAMING AT FWD EDGE. REF REO 670-54-21-1028, REV. NC, DATED 2009-06-15. COMPLIED WITH 51-900-1002-SKY. CHECKS GOOD. - [SDR SWIA202266628](https://openairdocs.org/sdr/SWIA202266628.md): None · worn · Sep 7, 2022 · N779SK · Cndair CL6002C10 > R/H UPPER TRANSCOWL LATCH DOOR HAS EXCESSIVE PLAY AT HINGE POINT. (C-CHECK RO 10/24/2022) ON R/H UPPER TRANSCOWL LATCH-DOOR, REMOVED WORN PARTS & INSTALLED NEW 1 EA. HINGE HOUSING P/N CN624-2030-205, 4 EA. BUSHING P/N CN624-2027-201, 8 EA. BOLT P/N B02 Next page: https://openairdocs.org/jasc/7800/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE jasc_code = '7800' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/jasc/7800/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.