# Service difficulty reports: Honeywell AS907-2-1A

A list on [Honeywell AS907-2-1A](https://openairdocs.org/engine/honeywell-as907-2-1a.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 2 · 53 reports

- [SDR DXTA2026101410122](https://openairdocs.org/sdr/DXTA2026101410122.md): Engine · flamed out · Oct 10, 2026 · N749QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DURING DESCENT AUDIBLE AND TACTILE VIBRATION OCCURRED FOLLOWED BY AMBER VIB INDICATION. RIGHT ENGINE INDICATIONS FLUCTUATED. RIGHT ENGINE FLAMED OUT. SECURED ENGINE AND LANDED. REPLACED ENGINE. OPS/LEAK CHECKED GOOD IAW LMM 72-00-00.
- [SDR J7SA2026100500528](https://openairdocs.org/sdr/J7SA2026100500528.md): Hmu · unserviceable · Sep 21, 2026 · N507FX · Bombdr BD1001A10 · Fuel Controlling System
  > DIVERSION DUE TO THE LEFT ENGINE SURGING IN CRUISE WITH NO ASSOCIATED CAS MESSAGE. AIRCRAFT LANDED WITHOUT INCIDENT AT PHNL. REPLACED THE SUSPECTED FAULTY HYDROMECHANICAL UNIT IAW CH350 AMM 73-20-01. OPERATIONAL AND LEAK CHECKS GOOD.
- [SDR DXTA2026071708804](https://openairdocs.org/sdr/DXTA2026071708804.md): Engine · vibration · Jul 13, 2026 · N796QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > AT CRUISE AT FL400 FELT A VIBRATION IN PLANE. ABOUT A MIN LATER L ENG VIBRATION CASS MESS CAME ON. WHILE PULLING OUT QRH, RECEIVED A LT ITT EXCEEDANCE WARNING. BEGAN SMELLING SMOKE IN CABIN. PUT ON O2 MASK. RECEIVED A LT ENG FLAMEOUT CASS MESSAGE NEXT. RAN QR
- [SDR DXTA2026052608193](https://openairdocs.org/sdr/DXTA2026052608193.md): Engine · failed · May 22, 2026 · N701QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > ON CLIMBOUT SHORTLY AFTER TAKEOFF, RECEIVED A STRONG VIBRATION FOLLOWED BY A L ENG EXCEEDANCE CAS & A OVERTEMP ON ITT. REDUCED THUST LEVER TO BRING ITT DOWN. RECEIVED A LT ENG VIBRATION CAS FOLLOWED BY A LT ENG FLAMEOUT CASS. VIBRATION DECREASED BUT NEVER WEN
- [SDR E0YA202604090001](https://openairdocs.org/sdr/E0YA202604090001.md): Engine · failed · Apr 8, 2026 · N822LL · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > ON SHORT FINAL APPROACH INTO AGS FELT A VIBRATION FROM THE LEFT ENGINE. SHUT ENGINE DOWN AND LANDED WITHOUT INCIDENT. UPON PRELIMINARY INSPECTION COULD NOT ROTATE TURBINE AND METAL DEBRIS FOUND IN TAIL.
- [SDR 2026FA0000230](https://openairdocs.org/sdr/2026FA0000230.md): Liner · debonded · Mar 27, 2026 · N350AT · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > LEFT ENGINE COMPRESSOR STALL AFTER T/O ON CLIMB OUT - COMPUTER RECORDED UNCOMMANDED ENGINE SURGES - CREW REDUCED POWER AND RETURNED TO AIRPORT WITHOUT INCIDENT - BORESCOPE OF ENGINE SHOWED "METCO LINER RELEASE AND BENT COMPRESSOR BLADES" - OUT OF CAUTION WE BO
- [SDR CWQA20260322001](https://openairdocs.org/sdr/CWQA20260322001.md): Sensor · failed · Mar 22, 2026 · N250AG · Bombdr BD1001A10 · Hydraulic Indicating System
  > DURING CLIMB AFTER TAKEOFF FROM APF CREW RECEIVED AMBER “R HYD TEMP HIGH” CAS MESSAGE. MESSAGE CAME AND WENT 3 TIMES BEFORE STAYING ON. CREW FOLLOWED CHECKLIST, TURNED OFF PUMP, AND CLOSED R SOV, HOWEVER TEMP CONTINUED TO VARY BETWEEN 150 AND 204. CREW CONT
- [SDR U5QA202603120167](https://openairdocs.org/sdr/U5QA202603120167.md): Engine · stalled · Mar 12, 2026 · N359VJ · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DURING T/O AT KDAL, CREW REPORTED OF HEARING A LOUD BANG DURING ROTATION PHASE, AFTER CLIMBING TO A SAFE ALTITUDE AND APPLICATION OF DORDAR (DECISION PROCESS) THEY SUSPECTED OF A BLOWN LH TIRE DURING TAKEOFF, AFTER THE EVENT, NO EVIDENCE OF BLOWN TIRES, NOR DA
- [SDR 2026FA0000141](https://openairdocs.org/sdr/2026FA0000141.md): Seal · debonded · Feb 25, 2026 · N350AT · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > CREW EXPERIENCE COMPRESSOR STALLS ON CLIMB OUT AFTER TAKE OFF - CREW REDUCED POWER AND RETUNED TO LAND WITHOUT INCIDENT. UPON INVESTIGATION AND BORESCOPE IT WAS FOUND THAT THE ABRADABLE LINER HAD RELEASED AND GONE THROUGH THE NR 3 AND 4 COMPRESSOR SECTION AN
- [SDR DXTA2026021206851](https://openairdocs.org/sdr/DXTA2026021206851.md): Engine · faulted · Feb 9, 2026 · N782QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > AFTER MLG RETRACTION, HEARD RAPID LOUD BANGS FOLLOWED BY A PAUSE, THEN ANOTHER RAPID LOUD BANGS. N1 LT ENG DROPPED FROM CLIMB POWER TO APPROX 62.7% DURING BANGS, RETURNED TO NORMAL WHEN CEASED. TOWER STATED BANGS WERE HEARD WITH A MOMENTARY FIREBALL FROM
- [SDR DXTA2026021206838](https://openairdocs.org/sdr/DXTA2026021206838.md): Engine · faulted · Feb 9, 2026 · N758QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > AFTER DEPARTURE AT APPROXIMATELY 700 FEET MSL, A LOUD BANG OR SERIES OF BANGS WAS HEARD AND FELT. MOMENTARY VIBRATION WAS FELT THROUGH AIRFRAME. THE AIRCRAFT YAWED AND ROLLED. WE CONTINUED CLIMB TO 3000 FEET AND DECLARED AN EMERGENCY. WE DIVERTED TO KJFK AND L
- [SDR 2026FA0000206](https://openairdocs.org/sdr/2026FA0000206.md): Engine · damaged · Feb 4, 2026 · N350PD · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > A LOUD BANG HEARD FROM RIGHT SIDE OF AIRCRAFT ON TAKEOFF FROM KFRG AT 600 FEET WHILE GEAR WAS GOING INTO WELL. CREW THOUGHT IT WAS A GEAR UPLOCK ISSUE. GEAR INSPECTED WITH NO DEFECTS FOUND. A FEW DAYS LATER AFTER ENGINE DATA DOWNLOADS IT WAS DETERMINED THE NR
- [SDR DXTA2025121506115](https://openairdocs.org/sdr/DXTA2025121506115.md): Engine · sparks · Dec 12, 2025 · N706QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DURING TAKEOFF ROLL AT APPROX 80KTS FELT ACFT YAW TO LT & SHAKING. ABORTED TAKEOFF. EXITED THE RUNWAY, GOT A RED LT ENGINE EXCEEDANCE CAS MESSAGE. ATC TOLD US HE SAW SPARKS COMING OUT OF ENG. STARTED APPROPRIATE CHKLST GOT LT ENG FLAME OUT CAS MESSAGE. SA
- [SDR 3EJA202601150001](https://openairdocs.org/sdr/3EJA202601150001.md): Engine · failed · Dec 7, 2025 · N390JS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > AT APPROX 400 FEET WE HAD A LEFT ENGINE EXCEEDANCE WITH RED CAS MESSAGE, AND THE ENGINE WENT TO IDLE. ENGINE REMOVED FOR REPAIR
- [SDR DXTA2025042403169](https://openairdocs.org/sdr/DXTA2025042403169.md): Wire Harness · faulted · Apr 21, 2025 · N793QS · Bombdr BD1001A10 · Engine Fuel System Wiring
  > R FADEC FAIL AMBER CAS: AT FL410, RECEIVED AN AMBER R FADEC FAIL CAS. RIGHT ENGINE AUTOMATICALLY REDUCED TO IDLE. RAN APPRIATE QRH PROCEDURE FOR DISPLAYED CAS. B3-302584 CORRECTIVE ACTION: REMOVED W5 HARNESS CAREFULLY AND ROUTED OUT OF THE ENGINE. SWAPPED AS
- [SDR DXTA2025013102148](https://openairdocs.org/sdr/DXTA2025013102148.md): Oil System · low · Jan 29, 2025 · N788QS · Bombdr BD1001A10 · Turbine Engine Oil System
  > R ENG OIL PRESS LOW CAS: ON CLIMBOUT, RIGHT ENGINE OIL PRESSURE LOW RED CAS ILLUMINATED WITH AN ASSOCIATED OIL PRESSURE INDICATION OF 41 PSI. FOLLOWED QRH AND PERFORMED PRECAUTIONARY SHUT-DOWN OF RIGHT ENGINE DUE TO CONTINUED DECREASE IN OIL PRESSURE. LANDED
- [SDR DXTA2024100800763](https://openairdocs.org/sdr/DXTA2024100800763.md): Engine · overtemp · Oct 5, 2024 · N778QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > WHILE DESCENDING ON OHSEA 2 ARRIVAL INTO KSNA & PASSING APPROX 15000 FT WITH POWER LEVERS NEAR IDLE, A VIBRATION FELT. NO CAS MESSAGE, DISCONNECTED AUTOPILOT TO SEE IF COULD FEEL ANY FEEDBACK IN CONTROLS. ALSO CHANGED POWER SETTINGS TO CHK ENG INDS. NORMAL
- [SDR DXTA2024091200481](https://openairdocs.org/sdr/DXTA2024091200481.md): Landing Gear · no discrepancy · Sep 8, 2024 · N739QS · Bombdr BD1001A10 · Landing Gear System
  > OVERWEIGHT LANDING: LANDED OVERWEIGHT DUE TO EMERGENCY AND ENGINE FAILURE. PLENTY OF RUNWAY AND GENTLE ON BRAKES. BASED ON THE AMM TASK 05-51-01-210-801 STEP 1.C(3)(A) AND THE INFORMATION PROVIDED FOR THE EVENT (AIRCRAFT LANDING WEIGHT AND RATE OF DESCENT) IT
- [SDR DXTA2024091200480](https://openairdocs.org/sdr/DXTA2024091200480.md): Engine · power loss · Sep 8, 2024 · N739QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > AT ROTATION, RED CAS & MASTER WARNING. ENG ROLLED BACK, CAME BACK UP, 2ND IDENTICAL CAS FOLLOWED BY ROLL BACK AGAIN. ENG DID NOT HAVE POWER CONTROL FOR ROUGHLY 1 MIN. REMOVED ENG SN: PL36679 DUE TO ITI OVER TEMP OF L 197 DEGREES. INSTALLED REPAIRED ENG SN: PL
- [SDR DXTA2024072212409](https://openairdocs.org/sdr/DXTA2024072212409.md): Engine · surges · Jul 19, 2024 · N766QS · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > DURING TAKEOFF, IMMEDIATELY AFTER ACFT BECAME AIRBORNE, HEARD 3-4 LOUD BANGS FROM WHAT SOUNDED LIKE THE LT ENG. BELIEVE IT WAS POSSIBLY A COMPRESSOR STALL. RIGHT ENG UNEXPECTED SURGE. BELIEVE THE RT ENG SURGE WAS DUE TO THE LT ENG COMPRESSOR STALL. C/W EN
- [SDR DXTA2024062712180](https://openairdocs.org/sdr/DXTA2024062712180.md): Oil Cap · unsecure · Jun 27, 2024 · N757QS · Bombdr BD1001A10 · Turbine Engine Oil System
  > R ENG OIL PRESS LOW CAS: ON ARRIVAL HAD R ENG OIL PRESS LOW CAS. FOLLOWED QRH. SHUT RIGHT ENG DOWN. ON POST FLIGHT FOUND OIL CAP HAD CAME OFF RESOLUTION: VERIAED CREW DISCREPANCY. NOTED OIL GLASS WAS VERY LOW. ALSO THERE WAS A SIGNIFICANT AMOUNT OF OIL ALL OVE
- [SDR 2024F00014](https://openairdocs.org/sdr/2024F00014.md): Cap · unsecure · Jan 19, 2024 · N480CB · Bombdr BD1001A10 · Turbine Engine Oil System
  > #2 ENGINE LOW OIL PRESSURE INDICATION AT CRUISE. REDUCED POWER BY 5% N1 AND OIL PRESSURE CAME BACK IN THE GREEN. PRECAUTIONARY DIVERT TO PHX AND DECLARED EMERGENCY. ENGINE WAS NOT SHUTDOWN INFLIGHT. ORIGINAL ROUTING DAL-LAS. UPON INSPECTION BY TECHNICIAN IN PH
- [SDR DXTA2021122053920](https://openairdocs.org/sdr/DXTA2021122053920.md): Compressor · stalled · Dec 20, 2021 · N778QS · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > LEFT ENGINE ENGINE COMPRESSOR STALL: ON CLIMB OUT, UPON FIRST POWER REDUCTION WE EXPERIENCED WHAT WE BELIEVE WAS COMPRESSOR STALLS. THE VIBRATION/ STALLS WERE FELT IN THE RUDDER PEDALS AND YOKE. THE ENGINE EVENT MARKER WAS UTILIZED. REMOVED AND REPLACED THE
- [SDR DXTA2021090348120](https://openairdocs.org/sdr/DXTA2021090348120.md): Engine · damaged · Sep 2, 2021 · N774QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > RIGHT ENGINE ENGINE COMPRESSOR STALL: ON ROTATION FOR TAKEOFF A SCRAPING SOUND WAS HEARD FROM THE RIGHT SIDE OF THE AIRCRAFT. IT WASN'T A SOUND I HAD HEARD BEFORE IN THIS AIRPLANE. AFTER THE FACT, THE OWNER COMMENTED SHE HEARD TWO DISTINCT POPS AT THAT TIME. I
- [SDR DXTA2021060243050](https://openairdocs.org/sdr/DXTA2021060243050.md): Fadec · defective · Jun 2, 2021 · N780QS · Bombdr BD1001A10 · Fuel Controlling System
  > ON TAKE OFF ROLL, RIGHT ENGINE SEEMED SLOW TO POWER UP AND ONLY GOT ABOUT TWO THIRDS POWER, THEN ITT TURNED RED AND RED CAS MESSAGE R ENGINE EXCEEDANCE ILLUMINATED AND WE ABORTED TAKEOFF. THE PASSENGERS SAID THEY HEARD SEVERAL LOUD BANGS COMING FROM THE BACK
- [SDR 2021FA0000057](https://openairdocs.org/sdr/2021FA0000057.md): Engine · vibrates · Jan 12, 2021 · N247JD · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > CLIMBING THROUGH FLIGHT LEVEL 350 WE NOTICED A VIBRATION FOLLOWED BY A RISE IN ITT AND AN “ENGINE VIB” EICAS MESSAGE. PER THE QRH, WE SECURED THE ENGINE VIA PRECAUTIONARY SHUT DOWN CHECKLIST. WE LANDED WITH NO FURTHER INCIDENT. THE ENGINE HAS BEEN REMOVED A
- [SDR AMCR20210108](https://openairdocs.org/sdr/AMCR20210108.md): Bearing · destroyed · Dec 30, 2020 · N522AC · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > SHORTLY AFTER OUR INITIAL DESCENT FROM CRUISE ALTITUDE, DESCENDING THROUGH ABOUT 37,000 FEET, WE EXPERIENCED A LOUD, HIGH FREQUENCY VIBRATION. WHILE ADJUSTING THRUST IN ORDER TO DETERMINE THE CAUSE OF THE VIBRATION, WE NOTICED INCREASING ITT ON THE RIGHT ENGI
- [SDR J7SA2020111700241](https://openairdocs.org/sdr/J7SA2020111700241.md): Blade · damaged · Nov 14, 2020 · N584FX · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > ON TAKEOFF OUT OF KMCC DURING GEAR RETRACTION CREW FELT A VIBRATION IN THE RUDDER PEDALS AND HEARD A LOUD BANG. CREW FOLLOWED AFM AND CYCLED THE GEAR AGAIN WITH NO ANOMALIES. CONTINUED TO KBZN WHERE MX FOUND NO DISCREPANCY WITH THE GEAR, BUT FOUND A DOUBLE E
- [SDR J7SA2020111200238](https://openairdocs.org/sdr/J7SA2020111200238.md): Unknown · vibration · Nov 6, 2020 · N573FX · Bombdr BD1001A10 · Fuselage Structure (General)
  > DIVERTED DUE TO 4 RAPID LOUD BANGS AND VIBRATION THROUGHOUT THE AIRCRAFT ON TAKEOFF THROUGH 15000 FT. ENGINE PARAMETERS WERE NORMAL, NO NEW DISCREPANCIES DISPLAYED DURING REMAINDER OF FLIGHT. SUSPECT MEDCO COATING LIBERATION WITHIN HTF7350 ENGINE. AIRCRAFT
- [SDR J7SA2020111700242](https://openairdocs.org/sdr/J7SA2020111700242.md): Blades · damaged · Nov 6, 2020 · N573FX · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DIVERTED DUE TO 4 RAPID LOUD BANGS AND VIBRATION THROUGHOUT THE AIRCRAFT ON TAKEOFF THROUGH 15000 FT. ENGINE PARAMETERS WERE NORMAL, NO NEW DISCREPANCIES DISPLAYED DURING REMAINDER OF FLIGHT. SUSPECT MEDCO COATING LIBERATION WITHIN HTF7350 ENGINE. AIRCRAFT
- [SDR DXTA2020102004243](https://openairdocs.org/sdr/DXTA2020102004243.md): Pump · failed · Oct 20, 2020 · N705QS · Bombdr BD1001A10 · Engine Oil Pressure
  > DURING DESCENT AT 10000 FT RED RT ENGINE OIL PRESS LOW CAS MESSAGE DISPLAYED. WE DID THE APPROPRIATE QRH PROCEDURE AND SHUT THE ENGINE DOWN. CORRECTIVE ACTION: PERFORMED HONEYWELL SIL D204801000001 REV 1 DATED 12 JAN 2018 AND FOUND ENGINE OIL PUMP FAILED. R
- [SDR J7SA2020091400221](https://openairdocs.org/sdr/J7SA2020091400221.md): Compressor · stalled · Sep 10, 2020 · N570FX · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > AIR TURN BACK DUE TO CONSECUTIVE 'LOUD BOOMS' FOLLOWED BY THE AIRCRAFT SHAKING VIOLENTLY DURING CLIMB WHILE BRINGING THE LANDING GEAR UP. IT DID NOT CONTINUE, SO THE CREW FLEW FOR ABOUT 5 MINUTES AS THEY TRIED TO DETERMINE IF IT WAS THE ENGINE OR IF IT WAS A
- [SDR J7SA20200602001](https://openairdocs.org/sdr/J7SA20200602001.md): Unknown · malfunctioned · Jun 2, 2020 · N575FX · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DURING CLIMB OUT OF KPSP, THE CREW EXPERIENCED A LOUD NOISE FOLLOWED BY A JOLT, HARSH GRINDING SOUND, NOTICEABLE YAW AND A BRIEF L ENG EXCEED CAS MESSAGE, EMERGENCY DECLARED. AFTER REDUCING POWER, A HARSH GRINDING SOUND WAS HEARD. PROCEDURES FOLLOWED FOR ENG
- [SDR DXTA2020060103721](https://openairdocs.org/sdr/DXTA2020060103721.md): Hmu · damaged · May 29, 2020 · N793QS · Bombdr BD1001A10 · Fuel Controlling System
  > DURING CRUISE FLIGHT, THE RIGHT ENGINE LOST APPROXIMATELY 1% N1 FOR ABOUT 30 SECONDS. THIS SAME LOSS WAS REPEATED AN ADDITIONAL TWO TIMES DURING CRUISE. THESE 1% LOSSES WERE FOLLOWED BY A 15% LOSS (85.3% TO 70%) OF RIGHT ENGINE N1. DURING DESCENT, R FADEC FAIL
- [SDR J7SA2020051907001](https://openairdocs.org/sdr/J7SA2020051907001.md): Compressor Blade · damaged · Mar 7, 2020 · N581FX · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > AIR TURN BACK DUE TO A LOUD NOISE THAT SOUNDED LIKE A BIRD STRIKE OR POSSIBLE COMPRESSOR STALL ON TAKEOFF. EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT INCIDENT AT KTEB. ENGINE SENT TO OVERHAUL SHOP AFTER BORESCOPE REVEALED DAMAGE TO THE COMPRESSOR BLADES.
- [SDR U5QA2019123070094](https://openairdocs.org/sdr/U5QA2019123070094.md): Bleed Valve · inoperative · Dec 27, 2019 · N312EA · Bombdr BD1001A10 · Compressor Bleed Valve
  > ON DEPARTURE AT APPROX. 600 FEET AGL EXPERIENCED MULTIPLE COMPRESSOR STALLS. REDUCED THROTTLE FROM CLIMB POWER TO APPROX. 80% WHEN THE COMPRESSOR STALLS OCCURRED. CONFIRMED IT WAS RH ENGINE AFTER SEEING N1 ROLLING BACK. BROUGHT POWER TO IDLE AND RETURNED FOR
- [SDR U5QA2019122320093](https://openairdocs.org/sdr/U5QA2019122320093.md): Engine · power loss · Dec 22, 2019 · N312EA · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > ON DEPARTURE FROM RWY05 AT BCT AT APPROX 500' THE RH ENGINE MADE 2 LOUD THUMPING/GRINDING SOUNDS LASTING A FEW SECONDS. N1 INDICATIONS SHOWED A DECREASE IN ROTATION BOTH TIMES. PIC REDUCED THE RH ENGINE TO IDLE AND RETURNED TO BCT FOR LANDING. THERE WERE NO C
- [SDR DXTA2019092202871](https://openairdocs.org/sdr/DXTA2019092202871.md): Engine · power loss · Sep 22, 2019 · N766QS · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > LEFT ENGINE ENGINE COMPRESSOR STALL EVALUATE - ON TAKEOFF FROM TEB RUNWAY 24 WE EXPERIENCED TWO SUBSTANTIAL AIRFRAME SHUDDERS AFTER POWER REDUCTION AND DURING GEAR RETRACTION AT ABOUT 500' AGL 170KTS FLAPS 10. THERE WERE NO COCKPIT INDICATIONS OR WARNINGS. UPO
- [SDR J7SA20190920001](https://openairdocs.org/sdr/J7SA20190920001.md): Engine · malfunctioned · Sep 20, 2019 · N571FX · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > DIVERTED DUE TO LOUD BANG, AIRCRAFT SHUTTER, AND ENGINE 2 ROLL BACK WHILE PASSING THROUGH 10,000 FEET AT 250 KTS. AS #2 ENGINE ROLLED BACK. N2 INDICATED MAGENTA DASHES, N1 INDICATED 11%, R FADEC FAIL AMBER CAS. L&R AUX BUS OFF CYAN CAS PERFORMED SINGLE ENG LA
- [SDR 9PMA2020042700002](https://openairdocs.org/sdr/9PMA2020042700002.md): Dcu · failed · Jul 23, 2019 · N332AR · Bombdr BD1001A10 · Engine Thrust Reverser
  > PIC REPOPRTS THRUST REVERSER WOULD NOT STOW. CONTACTED BOMBARDIER MRT FOR OSR. DIRECTIONAL CONTROL UNIT CAUSING INTERMITTENT FAILURE. BOMBARDIER PERFORMEDD SIL AS907-6 AND RESTOWED AFTER REPLACEMENT OF DCU FOR RTS. UPON FURTHER INSPECTION NO DAMAGE WAS CAUSED
- [SDR DXTA2019061302495](https://openairdocs.org/sdr/DXTA2019061302495.md): Wire Harness · failed · Jun 13, 2019 · N731QS · Bombdr BD1001A10 · Engine Oil System Wiring
  > R ENG OIL PRESS LOW CAS ILLUMINATED - IN FLIGHT AT FL410 RIGHT ENG OIL PRESS LOW RED CAS MESSAGE ILLUMINATED. OIL PRESS WAS CONFIRMED LOW ON EICAS. FOLLOWED CHECKLIST AND SECURED THE ENGINE. ON POST FLIGHT NO VISIBLE OIL LEAKING FROM RIGHT ENGINE AND VISUA
- [SDR CA190614015](https://openairdocs.org/sdr/CA190614015.md): Oil System · low pressure · Jun 13, 2019 · Bombdr BD1001A10 · Engine Oil Indicating System
  > (CAN) R ENG OIL PRESS LOW CAS ILLUMINATED - IN FLIGHT AT FL410 RIGHT ENG OIL PRESS LOW RED CAS MESSAGE ILLUMINATED. OIL PRESS WAS CONFIRMED LOW ON EICAS. FOLLOWED CHECKLIST AND SECURED THE ENGINE. ON POSTFLIGHT NO VISIBLE OIL LEAKING FROM RIGHT ENGINE AND VISU
- [SDR CA190515015](https://openairdocs.org/sdr/CA190515015.md): Engine · surges · May 9, 2019 · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > (CAN) R/H ENGINE SURGE AT 200 FT FOR 3 SECONDS AND LOSS OF THRUST. JA BASEL WILL ARRIVE 31/01 TO BEGIN TROUBLESHOOTING. ABORTED TAKE OFF AT 100KTS DUE TO BRAKE #4 STARTED TO DRAG (ANTISKID KICKED IN). TAXIED BACK AND BRAKE WAS SMOKING. NO CAS MESSAGES POSTED.
- [SDR DXTA2019022542074](https://openairdocs.org/sdr/DXTA2019022542074.md): Cap · missing · Feb 24, 2019 · N788QS · Bombdr BD1001A10 · Turbine Engine Oil System
  > RIGHT ENGINE ENGINE OIL - DURING FLIGHT CLIMBING OUT OF 10,000 FEET WE GOT THE LOW OIL PRESS RIGHT SIDE RED WARNING CAS MESSAGE. WE FOLLOWED THE CHECKLIST. WE HAD TO SECURE THE ENGINE AND RETURN FOR A LANDING AFTER DECLARING AN EMERGENCY. AFTER SHUT DOWN WE F
- [SDR CA190220019](https://openairdocs.org/sdr/CA190220019.md): Engine · surges · Feb 18, 2019 · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > (CAN) ABORTED TAKEOFF ON THE LIVE LEG FROM MMSL FOR AN N1 COMPRESSOR STALL. ON THE ROLL AROUND V1, THERE WAS A LOUD BANG AND THE TAIL JARRED TO ONE SIDE. ABORTED TAKEOFF. STILL UNDER INVESTIGATION. (TC# 20190220019)
- [SDR KKVA20190218001](https://openairdocs.org/sdr/KKVA20190218001.md): Converter · odor · Feb 13, 2019 · N352VJ · Bombdr BD1001A10 · Cabin Cooling System
  > CREW ADVISED OF "BURNING SMELL IN CABIN" AND THAT "SMOKE FUMES WERE SMELLED IN THE CABIN". AIRCRAFT DIVERTED BACK TO POINT OF DEPARTURE AT KBDL. SUSPECT SMELL TO BE FROM INSTALLATION OF "NEW" UPPER AND LOWER OZONE CONVERTERS INSTALLED PRIOR TO DEPARTURE TO C
- [SDR CA190220016](https://openairdocs.org/sdr/CA190220016.md): Compressor · failed · Jan 31, 2019 · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > (CAN) CREW REPORTED A LOUD BANG AND VIBRATION FELT BY THE CREW AND PASSENGERS JUST AFTER TAKE OFF AT APPROXIMATELY 1500` AGL, WHILE THE LANDING GEAR WAS IN TRANSIT. NO ABNORMAL INDICATIONS OR CAS MESSAGES RECEIVED, AND NO OBVIOUS SIGNS OF FOD STRIKE. LH ENGINE
- [SDR KKVA2018102316002](https://openairdocs.org/sdr/KKVA2018102316002.md): Engine · malfunctioned · Oct 16, 2018 · N350VJ · Bombdr BD1001A10 · Engine (Turbine/Turboprop)
  > WE WERE CLEARED TO CLIMB TO 15000FT ON RUNWAY HEADING. CLIMBING THROUGH 7000FT A VIBRATION WAS FELT, FOLLOWED BY AN ENGINE VIBRATION CAS MSG AND ENGINE EXCEEDANCE CAS MSG. THE LEFT THRUST LEVER WAS PULLED TO IDLE (THE ENGINE EXCEEDANCE CAS MSG WENT AWAY) AND
- [SDR DXTA2018080601265](https://openairdocs.org/sdr/DXTA2018080601265.md): O-Ring · leaking · Aug 4, 2018 · N727QS · Bombdr BD1001A10 · Turbine Engine Oil System
  > AFTER TAKEOFF, CLIMBING THROUGH 10K FEET, RECEIVED A RIGHT RED LOW OIL PRESSURE CAS MESSAGE. PERFORMED AN INFLIGHT PRECAUTION ENGINE SHUTDOWN IAW CHECK LIST. INSTALLED NEW ORINGS ON BOTH THE LT AND RT ENGINE OIL CAPS. NO FURTHER DEFECT NOTED.
- [SDR KKVA20180727001](https://openairdocs.org/sdr/KKVA20180727001.md): Engine · locked · Jul 21, 2018 · N354VJ · Bombdr BD1001A10 · Turbine Engine Compressor Section
  > ON CLIMBOUT BEFORE 10,000', HEARD ENGINE POP, THEN MADE GRINDING NOISE WITH VIBRATION. FUEL FLOW AND ITT SLIGHTLY HIGHER IN AFFECTED ENGINE. REDUCED POWER ON AFFECTED ENGINE AND TOLD ATC THAT AIRCRAFT WAS HAVING AN ENGINE ISSUE AND RETURNING TO AIRPORT VFR. NO

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## 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 engine_model_key = 'AS90721A'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/honeywell-as907-2-1a/reports

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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.