# Service difficulty reports: JASC 6123

A list on [JASC 6123](https://openairdocs.org/jasc/6123.md).

Reports filed under 6123 · Propeller Feathering/Reversing, newest first.

Page 1 of 19 · 919 reports

- [SDR KY72026F00003](https://openairdocs.org/sdr/KY72026F00003.md): Relay · faulted · Nov 15, 2025 · N366DC · Emb EMB120ER
  > AUTO FEATHER AURAL WARNING ALERT ON TAKEOFF WITH AUTO FEATHER ON. REMOVED & REPLACED RELAY K0161 IAW EMB120 WM 20-20-00 OPS CHECK GOOD IAW EMB120 MM 61-23-20 WPB RTC CHECK GOOD.
- [SDR O9IA20241015530LM](https://openairdocs.org/sdr/O9IA20241015530LM.md): Pressure Switch · faulted · Oct 14, 2024 · N530LM · Beech B200
  > FROM PILOTS REPORT THRU PRISM SMS: IN CRUISE AT 28,000 FT LEFT HAND ENGINE SEEMED TO WANT TO GO INTO FEATHER. HAPPENED TWO TIMES. DID A PRECAUTIONARY LANDING IN GALENA. SUSPECTED THE LOW PRESSURE SWITCH FOR AUTOFEATHER AFTER DEBREIF WITH THE PILOT. STATE
- [SDR QMLA2024100320128](https://openairdocs.org/sdr/QMLA2024100320128.md): Feathering Sys · faulted · Oct 2, 2024 · N912SM · Beech B200GT
  > DURING LANDING, THE RIGHT PROP ATTEMPTED TO FEATHER WITH THE AUTO FEATHER SYSTEM ON (AS THROTTLES WERE PULLED BACK FOR LANDING). PILOT SECURED THE AUTO FEATHER SYSTEM AND LANDED SAFELY. LOGBOOK ENTRY MADE AND TURNED AIRCRAFT OVER TO MAINT. ADJUSTED AUTO FEA
- [SDR 2023FA0000586](https://openairdocs.org/sdr/2023FA0000586.md): Bearing · cracked · Oct 5, 2023 · N5197X · Airtrc AT502B
  > PROP ORIGINALLY REMOVED FOR ISSUES WITH PROP NOT FULLY CYCLING THROUGH ITS FULL RANGE OF MOTION. HAD ONE BLADE THAT WAS NOT ACTUATING PROPERLY. WAS TAKING LONGER THAN NORMAL TO GO TO FEATHER. PROP WAS DELIVERED TO NORTHWEST PROPELLER SERVICE FOR OVERHAUL. B
- [SDR QXEA2021081700408](https://openairdocs.org/sdr/QXEA2021081700408.md): Feathering Sys · faulted · Aug 16, 2021 · N445QX · Bombdr DHC8402
  > LAST 2 FLIGHTS #2 PROPELLER HAS FAILED TO FEATHER COMPLETELY ON SHUTDOWN. REMOVED FROM SERVICE. MET A/C, INTERROGATED CDS, FOUND FAULT CODE 144 A/B. C/W Q400 FIM TASK 61-20-03-810-821. CLEARED FAULTS, RAN #2 ENGINE TWICE. FAULT CODE 144 REMAINED CLEARED BOTH T
- [SDR QXEA2021072000367](https://openairdocs.org/sdr/QXEA2021072000367.md): Propeller · malfunctioned · Jul 18, 2021 · N445QX · Bombdr DHC8402
  > #2 PROP DID NOT FULLY FEATHER DURING SHUTDOWN, NOTICED DURING WALK AROUND. NOTHING ABNORMAL FELT DURING SHUTDOWN. REMOVED FROM SERVICE. RAN #2 ENGINE, TOOK PROP IN AND OUT OF FEATHER MULTIPLE TIMES, PROPS NOW FULLY FEATHERED. SHUT DOWN #2 ENGINE. CONFIRMED PRO
- [SDR QXEA2021052500269](https://openairdocs.org/sdr/QXEA2021052500269.md): Pec · malfunctioned · May 24, 2021 · N427QX · Bombdr DHC8402
  > DURING SYSTEMS CHECKS, THE #2 AUTOFEATHER TESTS FAILED. REMOVED FROM SERVICE. INTERROGATED CDS FOUND FAULT CODE 402B #2 PROP. C/W FIM REF: 61-20-09-810-812. REMOVED AND REPLACED PEC FOR #2 ENGINE REF: AMM TASK 61-20-36-000-801, 61-20-36-400-801 PARA 1-5,A AN
- [SDR QXEA2021052400265](https://openairdocs.org/sdr/QXEA2021052400265.md): Autofeather Sys · no test · May 22, 2021 · N427QX · Bombdr DHC8402
  > #2 AUTOFEATHER FAILED TEST FOR DAILY SYSTEM CHECK. REMOVED FROM SERVICE. PERFORMED OPS TEST OF THE PROP AUTOFEATHER SYSTEM IAW Q400 AMM 61-20-00-710-810. OPS TEST PASSED. NO FURTHER DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2021051200234](https://openairdocs.org/sdr/QXEA2021051200234.md): Autofeather Sys · no test · May 12, 2021 · N439QX · Bombdr DHC8402
  > A/F TEST FOR FO DAILY CHECKS #2 FAILED #1 ABORT. REMOVED FROM SERVICE. CYCLED POWER ON A/C. C/W OPS TEST OF PROP AUTOFEATHER UPTRIM IAW Q400 AMM TASK 61-20-00-710-810. OPS TEST GOOD. AUTOFEATHER PASSED. NO FAULTS IN CDS. NO PARTS REPLACED. AIRCRAFT RETURNED TO
- [SDR QXEA2021042800199](https://openairdocs.org/sdr/QXEA2021042800199.md): Switch · inoperative · Apr 27, 2021 · N412QX · Bombdr DHC8402
  > A/F DID NOT ARM AFTER ADDING POWER FOR TAKEOFF. TAKEOFF ABORTED AROUND 60 KNOTS. REMOVED FROM SERVICE. NO FAULTS PRESENT IN CDS, FOLLOWED Q400 AMM 61-20-00-710-810 PART A OPS TEST PASSED. REF Q400 MCN 661292-001 ISSUE 1. DUE TO SIG EVENT ENGINE RUN OF THE AUTO
- [SDR 2021FA0000099](https://openairdocs.org/sdr/2021FA0000099.md): Valve · failed · Apr 9, 2021 · N42LA · Diamon DA42NG
  > PROPELLER UNFEATHER VALVE FAILURE. ENGINE SHUT DOWN DURING NORMAL TRAINING. ENGINE WOULD NOT RESTART BECAUSE PROPELLER WOULD NOT UNFEATHER. BROUGHT AIRCRAFT BACK TO HOME BASE SINGLE ENGINE LANDING.
- [SDR QXEA2021031900121](https://openairdocs.org/sdr/QXEA2021031900121.md): Warning Message · false activation · Mar 18, 2021 · N439QX · Bombdr DHC8402
  > AUTO FEATHER TEST "ABORT FAILED" AMBER MESSAGE ON ED. REMOVED FROM SERVICE. FOUND FAULT CODE 494 ON #2 ENG. PERFORMED FIM Q400 61-20-10-810-826. CLEARED CODE. PERFORMED A/F TEST. TEST PASSED. VERIFIED NO CODES AFTER TEST, NO FURTHER MAINT ACTIONS REQUIRED. NO
- [SDR QXEA2021021800066](https://openairdocs.org/sdr/QXEA2021021800066.md): Autofeather Sys · no test · Feb 18, 2021 · N427QX · Bombdr DHC8402
  > DURING DAILY SYSTEM CHECK THE NR 1 A/F TEST FAILED. REMOVED FROM SERVICE. CHECKED FOR FAULT CODES, FOUND CODE 494. C/W Q400 FIM 61-20-10-810-826. CODE CLEARED, TEST PASSED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2020120700344](https://openairdocs.org/sdr/QXEA2020120700344.md): Governor · malfunctioned · Dec 6, 2020 · N443QX · Bombdr DHC8402
  > NR 1 PROPELLER TOOK =35 SEC TO UNFEATHER ON START UP. REMOVED FROM SERVICE. REPLACED OVERSPEED GOVERNOR ON NR 1 ENGINE, IAW Q400 AMM TASK 61-20-26-000-801 AND 61-20-26-400-801. OPERATIONS TEST GOOD, NO FURTHER DEFECTS NOTED. PERFORMED FUNCTIONAL TEST OF PR
- [SDR QXEA2020120300333](https://openairdocs.org/sdr/QXEA2020120300333.md): Propeller · malfunctioned · Dec 2, 2020 · N443QX · Bombdr DHC8402
  > DURING MTX TAXI, NR 1 PROP FAILS TO UNFEATHER, ATTEMPTED TO UNFEATHER 5 TIMES NO HELP. C/W FIM 61-20-00-810-803 PARA 1-5A (5),6. C/W FUNCTIONAL TEST OF THE NR 1 PROPELLER TIME TO UNFEATHER CHECK, NO DEFECTS NOTED (17 SEC) TWO TIMES. UNFEATHER TEST WAS, IAW
- [SDR OZCA202011060001](https://openairdocs.org/sdr/OZCA202011060001.md): Shaft · sheared · Nov 2, 2020 · N631BC · Saab SF340A
  > 2020 NOV 2ND, N631BC (AS CSQ 726) FLYING FROM GRAND CAYMAN (MWCR) TO MIAMI (KMIA) EXPERIENCED AN UNSCHEDULED PROP FEATHERING AT ALTITUDE. CREW COMPLIED WITH QUICK REFERENCE HANDBOOK (QRH) AND EXECUTED AN ENGINE SHUTDOWN. CREW PRUDENTLY CONDUCTED AN EMERGENCY
- [SDR QXEA2020062600196](https://openairdocs.org/sdr/QXEA2020062600196.md): Autofeather Sys · faulted · Jun 25, 2020 · N439QX · Bombdr DHC8402
  > DURING DAILY SYSTEMS NR 2 ENG FAILED AUTO FEATHER CHECK. REMOVED FROM SERVICE. FOUND FAULT CODES 494AB, 228AB, AND 206AB IN CDS FOR NR 2 ENG. C/W FIM 61-20-10-810-826. PERFORMED OPS TEST OF PROP AUTO FEATHER AN UPTRIM SYSTEM IAW AMM 61-20-00-710-810. TEST FA
- [SDR QXEA2020061100180](https://openairdocs.org/sdr/QXEA2020061100180.md): Autofeather Sys · malfunctioned · Jun 10, 2020 · N401QX · Bombdr DHC8402
  > #2 ENGINE AUTO FEATHER ABORT DURING TEST. REMOVED FROM SERVICE. C/W #2 AUTOFEATHER ABORT FIM TASK 61-20-00-810-805. NO CDS FAULTS LOGGED. AUTOFEATHER TEST PASSED 2 CONSECUTIVE TIMES. NO DEFECTS NOTED AT THIS TIME. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2020051100163](https://openairdocs.org/sdr/QXEA2020051100163.md): Unknown · malfunctioned · May 10, 2020 · N400QX · Bombdr DHC8402
  > DURING DAILY SYSTEM CHECK AUTO FEATHER TEST #1 FAIL. REMOVED FROM SERVICE. AUTO FEATHER SYSTEM TEST FAILED. INTERROGATED POWER PLANT MESSAGE ON ED. FOUND FAULT CODES 494 & 382. C/W Q400 FIM 61-20-08-810-816 & FIM 61-20-10-810-826. PEC FAULTS CLEARED. AUTO FEAT
- [SDR OZCA2020033100000](https://openairdocs.org/sdr/OZCA2020033100000.md): Pressure Switch · faulty · Mar 24, 2020 · N681BC · Saab SF340A
  > FLIGHT CREW WRITE UP - AUTOCOARSEN FAILURE IN FLIGHT. LEFT ENG FEATHERED. "AUTOCOARSEN" CWP ILLUMINATED. LATER AFTER SPEAKING WITH CAPTAIN HE STATED THAT THE PROP DID NOT FEATHER IT WAS INDICATION ONLY.
- [SDR DATA2020031601](https://openairdocs.org/sdr/DATA2020031601.md): Switch · out of adjust · Mar 13, 2020 · N151CA · Stbros SD360200
  > IN CLIMB AT 3500 FEET WHEN PILOTS REDUCED THROTTLE THE RIGHT PROPELLER WENT INTO FEATHER. QRH PROCEDURES FOLLOWED, EMERGENCY DECLARED AND AIRCRAFT RETURNED TO BASE (SJU). SUBSEQUENT MAINTENANCE INVESTIGATION FOUND AUTOFEATHER MICRO-SWITCHES OUT OF ADJUSTMENT.
- [SDR QXEA2020021800107](https://openairdocs.org/sdr/QXEA2020021800107.md): Electronic Unit · malfunctioned · Feb 18, 2020 · N427QX · Bombdr DHC8402
  > CREW REPORTS ABORTED TAKEOFF AT 60 KNOT DUE TO AUTOFEATHER FAILING TO ARM. ABORTED TAKE OFF. REMOVED FROM SERVICE. R&R #2 PEC OPS TEST PASSED. PROP OVERSPEED GOV CHECK PASSED. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2020021800106](https://openairdocs.org/sdr/QXEA2020021800106.md): Autofeather Sys · malfunctioned · Feb 18, 2020 · N427QX · Bombdr DHC8402
  > AUTOFEATHER DIDN'T ARM ON TAKEOFF IN SEATTLE. NOTICED AT V1, CONTINUED TAKEOFF. REMOVED FROM SERVICE. INTERROGATED CDF FOR FAULT CODES IAW Q400 AMM 77-31-00-710-803 FOUND FAULT CODES 494A B, 70AB, ON BOTH ENGINES, 398AB ON #2 ENGINE. COMPLIED WITH Q400 FIM PRO
- [SDR QXEA2020021700104](https://openairdocs.org/sdr/QXEA2020021700104.md): Autofeather Sys · failed · Feb 16, 2020 · N427QX · Bombdr DHC8402
  > WHILE CONDUCTING DAILY SYSTEM CHECKS, AUTO FEATHER FAILED. POWER LEVERS WERE IN DISC. REMOVED FROM SERVICE. NO CORRELATED FAULT CODES, REF. FIM TASK 61-20-00-810-805. PERFORMED OPS TEST OF THE AUTO FEATHER/UPTRIM SYS. IAW AMM 61-20-00-710-810. OPS TEST GOOD,
- [SDR QXEA2020021200094](https://openairdocs.org/sdr/QXEA2020021200094.md): Autofeather Sys · no test · Feb 12, 2020 · N427QX · Bombdr DHC8402
  > DURING DAILY SYSTEM CHECK THE AUTO FEATHER TEST FAILED TWICE. REMOVED FROM SERVICE. PERFORMED AF + UPTRIM OPS TEST IAW Q400 AMM 61-20-00-710-810. OPS TEST PASS. DEFECTS NOTED AT THIS TIME. COULD NOT DUPLICATE. RETURNED TO SERVICE. NO PARTS REPLACED.
- [SDR RU3A202002121009](https://openairdocs.org/sdr/RU3A202002121009.md): Autofeather Sys · malfunctioned · Feb 11, 2020 · N84 · Beech 300BEECH
  > DURING INITIAL CLIMB OUT RT AUTOFEATHER ANNUNCIATOR EXTINGUISHED. WOULD NOT REARM AT INCREASED PWR SETTINGS.
- [SDR QXEA2020021200095](https://openairdocs.org/sdr/QXEA2020021200095.md): Autofeather Sys · malfunctioned · Feb 9, 2020 · N410QX · Bombdr DHC8402
  > UNABLE TO UNFEATHER THE #2 PROPELLER USING THE UNFEATHER SWITCH METHOD. PERFORMED OPERATIONAL TEST OF THE ALTERNATE FEATHER IAW AMM 61-20-00-710-802. OPERATIONAL CHECKS GOOD. COULD NOT DUPLICATE. NO PARTS REPLACED.
- [SDR JIKA2020011701](https://openairdocs.org/sdr/JIKA2020011701.md): Hmu · failed · Jan 17, 2020 · N567SW · Emb EMB120
  > DURING INITIAL CLIMB, AT ABOUT 1,000 FEET AGL, LH PROPELLER INADVERTENTLY FEATHERED. WE PERFORMED MEMORY ITEMS, FOLLOWED BY QRH. ENGINE PARAMETERS RETURNED BACK TO NORMAL. CREW RETURNED BACK TO BQN. MAINTENANCE REMOVED AND REPLACED LEFT HAND HMU WITH OPS AND L
- [SDR JIKA2020011501](https://openairdocs.org/sdr/JIKA2020011501.md): Control Cable · malfunctioned · Jan 10, 2020 · N544UP · Frchld SA227CC
  > AFTER TAKEOFF FROM KELM, APPROXIMATELY 600 AGL, RIGHT ENGINE FLAMEOUT. PILOT NOTICED THE RIGHT FUEL FLOW WAS AT ZERO AND PILOT CHECKED RIGHT ENGINE CONTROL LEVERS, STOP AND FEATHER, BOOST PUMPS AND IGNITION THEN ENGINE HAD WOUND DOWN. PILOT HAD REQUESTED AN
- [SDR JIKA2019083001](https://openairdocs.org/sdr/JIKA2019083001.md): Torque Sensor · intermittent · Aug 27, 2019 · N567SW · Emb EMB120ER
  > THE FLIGHT CREW REPORTED THAT DURING INITIAL CLIMB OUT AT APPROXIMATELY 500 FEET, THERE WAS A PARTIAL LOSS OF POWER ON THE LEFT HAND ENGINE. THIS LOSS COULD BE BOTH FELT AND HEARD, AND WAS ACCOMPANIED BY A SLIGHT DROP IN TORQUE AND A SIGNIFICANT DROP IN PROP S
- [SDR CA190807001](https://openairdocs.org/sdr/CA190807001.md): Bolt · missing · Aug 3, 2019 · Bombdr DHC8400
  > (CAN) PILOT REJECTED T.O DUE TO #1 LOW OIL PRESSURE INDICATION. MAINTENANCE FOUND OIL LEAK FORM THE #1 ENGINE, SPECIFICALLY FROM THE FEATHERING PUMP. OIL PUMP COVER WAS MISSING A BOLT CAUSE THE OIL LEAK. (TC# 20190807001)
- [SDR CA190731030](https://openairdocs.org/sdr/CA190731030.md): Switch · malfunctioned · Jul 29, 2019 · Dhav DHC6300
  > (CAN) DURING THE TAKE-OFF SLIDE, THE AUTO FEATHER SWITCH WOULD NOT ARM. THE PILOTS ABORTED THE TAKE-OFF AND RETURNED TO THE DOCK. THE SWITCH WAS REPLACED, AND THE SYSTEM TESTED SERVICEABLE. NOTE: THIS OPERATOR HAS HAD MULTIPLE AUTO FEATHERS SWITCHES FAIL, SEV
- [SDR CA190724012](https://openairdocs.org/sdr/CA190724012.md): Switch · malfunctioned · Jul 16, 2019 · Dhav DHC6300
  > (CAN) THE AUTO FEATHER ARM LIGHT DID NOT TURN ON DURING THE TAKE-OFF SLIDE. THE AUTO FEATHER SWITCH WAS REPLACED, AND THE SYSTEM FUNCTION CHECKED SERVICEABLE. (TC# 20190724012)
- [SDR RU3A20190709032](https://openairdocs.org/sdr/RU3A20190709032.md): Unknown · malfunctioned · Jul 8, 2019 · N72 · Beech 300BEECH
  > NO AUTO FEATHER RT ENG DURING T/O ROLL.
- [SDR QXEA2019051300211](https://openairdocs.org/sdr/QXEA2019051300211.md): Unknown · malfunctioned · May 11, 2019 · N441QX · Bombdr DHC8402
  > ON START UP THE NR 2 ENG TAKES AN ABNORMALLY LONG TIME TO COME OUT OF FEATHER. AFTER NR 1 AC GEN LIGHT GOES OUT IT TAKES APPROX 5-6 SEC FOR NR 2 AC GEN LIGHT TO EXTINGUISH. REMOVED FROM SERVICE. PERFORMED A FUNCTIONAL TEST OF THE PROPELLER TIME TO UNFEATHER.
- [SDR CA190410013](https://openairdocs.org/sdr/CA190410013.md): Torque Sensor · failed · Apr 9, 2019 · Dhav DHC8301
  > (CAN) #2 PROP COMMANDED FEATHER AT TAKE OFF POWER ON TAKE OFF ROLL. TAKE OFF REJECTED AT 70KTS. CREW REPORTED THAT THE PROP UNFEATHERED ON ITS OWN AND THEY COULD NOT CONFIRM WHAT THE TORQUE GAUGE WENT TO BUT THEY DID SEE 100%. NO ASSOCIATED CAUTIONS. AUTO FEAT
- [SDR CA190816008](https://openairdocs.org/sdr/CA190816008.md): Autofeather Sys · malfunctioned · Apr 2, 2019 · Raythn B300RAYTHEON
  > (CAN) AN ATTACHMENT ANCHOR NUT SECURING THE FWD I/B SIDE OF THE OVER-WING LOCKER MODIFICATION THAT WORE INTO THE WIRING OF THE RH ENGINE AUTO-FEATHER SYSTEM. ALTHOUGH THERE WAS PROTECTIVE SPIRAL WRAP AROUND THE WIRE BUNDLE CONTAINING THE WIRING, BECAUSE OF ITS
- [SDR QXEA2019032900145](https://openairdocs.org/sdr/QXEA2019032900145.md): Unknown · malfunctioned · Mar 26, 2019 · N452QX · Bombdr DHC8402
  > #1 PROPELLER WILL NO UNFEATHER USING THE MAINTENANCE PANEL. AIRCRAFT DOWN FOR REPAIRS.
- [SDR CA190319026](https://openairdocs.org/sdr/CA190319026.md): Propeller · malfunctioned · Mar 19, 2019 · Piper PA44180
  > (CAN) PILOT REPORTED THAT THE RIGHT PROPELLER WAS FEATHERED WHEN HE WENT TO DO HIS WALK AROUND. AN ENGINE RUN WAS CARRIED OUT WITH NO DEFECTS FOUND. WHEN THE ENGINE WAS SHUT DOWN THE PROPELLER WOULD START TO FEATHER WITHIN 30 SECONDS AND CONTINUE UNTIL IT WAS
- [SDR QXEA2019031800127](https://openairdocs.org/sdr/QXEA2019031800127.md): Light · inoperative · Mar 15, 2019 · N401QX · Bombdr DHC8402
  > AUTOFEATHER BULB IS OUT. REMOVED FROM SERVICE. RE-LAMPED AUTOFEATHER SELECT SWITCH. OPS TEST GOOD. NO FURTHER DEFECTS. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2018031800126](https://openairdocs.org/sdr/QXEA2018031800126.md): Switch · malfunctioned · Mar 13, 2019 · N444QX · Bombdr DHC8402
  > TESTED NR 1 PROPELLER ALTERNATE FEATHER SWITCH ON PROP CONTROL PANEL USING CDS AND ARCDU IAW AMM 61-20-41-710-801. FOUND CHANNEL 1A TO OPERATE NOTMALLY BUT CHANNEL 1B STAYS ON WITH THE SWITCH IN THE ON AND OFF POSITIONS. REPLACED THE NR 1 ALTERNATE FEATHER SWI
- [SDR CA190314011](https://openairdocs.org/sdr/CA190314011.md): Switch · failed · Mar 7, 2019 · Dhav DHC6200
  > (CAN) DURING A TRAINING FLIGHT, THE CO-PILOT LET THE NOSE GET TOO HIGH, IN RESPONSE, THE PILOT PUSHED FORWARD AGGRESSIVELY TO AVOID A POTENTIAL STALL, AT WHICH POINT THE LEFT PROPELLER FEATHERED. AT THIS POINT THE AIRCRAFT ALTITUDE HAD BEEN CORRECTED. WHEN THE
- [SDR CA190315016](https://openairdocs.org/sdr/CA190315016.md): Switch · failed · Mar 2, 2019 · Dhav DHC6200
  > (CAN) PILOT REPORTED THAT THE PROPELLER DID NOT FEATHER WHILE CONDUCTING GROUND FUNCTION CHECK OF THE AUTO FEATHER SYSTEM. MAINTENANCE CHANGED THE SWITCH AND THE SYSTEM FUNCTION TESTED SERVICEABLE.
- [SDR CA190227012](https://openairdocs.org/sdr/CA190227012.md): Signal Cond Unit · failed · Feb 23, 2019 · Dhav DHC8301
  > (CAN) 2961 HRS SINCE REPAIR DURING T/O ROLL AS THE LH ENGINE TORQUE WAS RISING TO APPROX 70% THE TORQUE SURGED TO OVER 100% AND PROP RPM DROPPED TO APPOX 600-800 RPM. CAPT SAID IT SOUNDED LIKE THE PROP WAS PARTIALLY FEATHERING.TAKE OFF WAS REJECTED AT OR BELOW
- [SDR QXEA2019021400070](https://openairdocs.org/sdr/QXEA2019021400070.md): Propeller · slow · Feb 12, 2019 · N433QX · Bombdr DHC8402
  > #2 PROPELLER TAKES CLOSE TO 1 MINUTE TO COME OUT OF FEATHER. REMOVED FROM SERVICE. INTERRIGATED CDS. NO FAULTS FOUND. C/W FUNCTIONAL TEST OF PROP TIME TO UNFEATHER, AMM 61-20-00-720-802. OPS TEST GOOD. BOTH PROPS TAKE LESS THAN 30 SECONDS TO UNFEATHER. NO FURT
- [SDR QXEA2019020100057](https://openairdocs.org/sdr/QXEA2019020100057.md): Propeller · no test · Feb 1, 2019 · N428QX · Bombdr DHC8402
  > #1 PROP FAILED OPERATIONAL CHECK OF THE PROPELLAR ALTERNATE FEATHER REF T/C 612000202 STEP 1 ITEM 2E. PLACED ON MEL 61-20-1. RETURNED TO SERVICE.
- [SDR QXEA2019011100012](https://openairdocs.org/sdr/QXEA2019011100012.md): Unknown · malfunctioned · Jan 11, 2019 · N437QX · Bombdr DHC8402
  > NR 2 PROP FAILS TO UNFEATHER WITH FEATHER PUMP (PROP MTX UNFEATHER(S) INOP). REMOVED FROM SERVICE. PLACED ON MEL 61-20-1. NOTE: PROP FEATHERS AND UNFEATHERS NORMALLY WITH ENGINES RUNNING. AIRCRAFT RETURNED TO SERVICE.
- [SDR QXEA2019011100011](https://openairdocs.org/sdr/QXEA2019011100011.md): Pump · malfunctioned · Jan 10, 2019 · N429QX · Bombdr DHC8402
  > FOUND NR 1 ENG ALT FEATHER PUMP TO BE LEAKING AT THE ASSY. JOINTS. REMOVED AND REPLACED #1 FEATHERING PUMP IAW AMM TASK 61-20-31-000-801 AND 61-20-31-400-801 OPS AND LEAK CHECK GOOD.
- [SDR FXGA201812240001](https://openairdocs.org/sdr/FXGA201812240001.md): Propeller · sheared · Dec 21, 2018 · N451CE · Doug C118A
  > EXCESSIVE VIBRATION ON #4 ENGINE NO OTHER INDICATION PRECAUTIONARY SHUTDOWN #4 ENGINE/ TWO BLADES WENT TO FEATHER THIRD BLADE STAYED IN LOW PITCH CONDITION
- [SDR QXEA2018111200415](https://openairdocs.org/sdr/QXEA2018111200415.md): Pcu · inoperative · Nov 11, 2018 · N408QX · Bombdr DHC8402
  > DURING BETA TUBE INSTALLATION FOUND PROP WOULD FEATHER. WOULD NOT UNFEATHER. DISCONNECTED P30 FROM NR 1 PCU & CHECKED CONTINUITY OF UNFEATHER VALVE COIL (J30 PINS A TO B) FOUND 58.6 OHMS. REMOVED BETA TUBE REF AMM 61-20-01-000-801 BETA TUBE O RINGS INSP OK. B

Next page: https://openairdocs.org/jasc/6123/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 = '6123'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/6123/reports

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