# Service difficulty reports: Pratt & Whitney JFTD12A-4A

A list on [Pratt & Whitney JFTD12A-4A](https://openairdocs.org/engine/pratt-whitney-jftd12a-4a.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 3 · 108 reports

- [SDR JYDR20231019286](https://openairdocs.org/sdr/JYDR20231019286.md): Blade · broken · Oct 18, 2023 · Skrsky S64E · Turbine Section
  > AIRCRAFT WAS FIREFIGHTING WHEN PILOTS HEARD A LOW FREQUENCY RUMBLE. AIRCRAFT RETURNED TO BASE FOR TROUBLESHOOTING. AFTER TROUBLESHOOTING AMTS FOUND 1 EA. 2ND STAGE N1 BLADE HAD BROKEN OFF AT THE ROOT. ENGINE IS BEING RETURNED TO THIS REPAIR STATION FOR FURTHER
- [SDR JYDR20220406093](https://openairdocs.org/sdr/JYDR20220406093.md): None · broken · Apr 4, 2022 · Skrsky S64E · Turbine Section
  > AIRCRAFT WAS ON FERRY FLIGHT WHEN PILOT NOTICED LOSS OF OIL PRESSURE ON NUMBER 2 ENGINE. LARGE AMOUNT OF OIL ON RIGHT SIDE OF AIRCRAFT. ENGINE SHUT DOWN IN FLIGHT AND AIRCRAFT WAS LANDED AT CLOSEST AIRPORT. UPON INSPECTION BY MAINTENANCE AN 2ND STAGE N1 BLADE
- [SDR JYDR20220214044](https://openairdocs.org/sdr/JYDR20220214044.md): Turbine Blades · broken · Feb 13, 2022 · Skrsky S64E · Turbine Section
  > AIRCRAFT WAS LOGGING. PILOTS FELT VIBRATION FROM #2 ENGINE AND RETURNED TO SERVICE LANDING. WHEN SHUT DOWN ENGINE CAME TO A SUDDEN STOP AND LOCKED UP. WHEN FREE TURBINE WAS SEPARATED, A 2ND STAGE N1 BLADE WAS FOUND TO BE BROKEN AT THE ROOT. ENGINE IS BEING SEN
- [SDR JYDR20220120016](https://openairdocs.org/sdr/JYDR20220120016.md): None · broken · Jan 19, 2022 · Skrsky S64E · Engine/Transmission Coupling
  > WHILE LANDING FROM A HOVER, AS THE WHEELS TOUCHED DOWN A VIBRATION WAS FELT. PILOTS PULLED EACH ENGINE BACK SEPARATELY AND FOUND VIBRATION COMING FROM #2 ENGINE. AFTER AIRCRAFT SECURE MECHANICS FOUND A PIECE MISSING FROM #2 ENGINE TO MAIN GEAR BOX DRIVE SHAFT
- [SDR JYDR20210715194](https://openairdocs.org/sdr/JYDR20210715194.md): Engine · overtemp · Jul 14, 2021 · N154AC · Skrsky S64E · Engine (Turbine/Turboprop)
  > SHORT FINAL FOR WATER DROP. PILOT HEARD LOUD WOOSH SOUND FOLLOWED BY ROLLBACK CONDITIONS, 65% CHIME, 60% WARNING T5 RISING, N1 DROPPING. AIRCRAFT LANDED AT FIRST AVAILABLE LANDING AREA. THIS IS A PRELIMINARY REPORT TO MEET REPORTING TIME LIMITS.
- [SDR JYDR20210715184](https://openairdocs.org/sdr/JYDR20210715184.md): Engine · overtemp · Jul 13, 2021 · N217AC · Skrsky S64E · Engine (Turbine/Turboprop)
  > SHORT FINAL FOR WATER DROP. PILOT RECEIVED 65% CHIME THEN 60% WARNING. ENGINE SECURED AND AIRCRAFT RETURNED TO BASE SINGLE ENGINE. THIS IS A PRELIMINARY REPORT TO MEET REPORTING TIME LIMITS.
- [SDR JYDR20210615165](https://openairdocs.org/sdr/JYDR20210615165.md): Blade · broken · Jun 14, 2021 · N176AC · Skrsky S64E · Turbine Section
  > AIRCRAFT PERFORMING LOGGING OPERATIONS. PILOTS FELT VIBRATION AND NOISE. ENGINE SHUT DOWN IN FLIGHT, AIRCRAFT RETURNED TO LANDING AREA. MAINTENANCE FOUND DEBRIS IN TAIL PIPE. ENGINE REMOVED, FOUND 2ND STAGE N1 BLADE BROKEN, CAUSING EXTENSIVE DAMAGE THROUGH THE
- [SDR JYDR20210429](https://openairdocs.org/sdr/JYDR20210429.md): Blade · broken · Apr 29, 2021 · N6962R · Skrsky S64E · Turbine Section
  > AT SHUTDOWN PILOTS FELT VIBRATION AND HEARD NOISE. UPON INSPECTION MAINTENANCE FOUND INTERNAL FOD IN TAILPIPE. AFTER REMOVING ENGINE, MAINTENANCE FOUND 2ND STAGE N1 TURBINE BLADE HAD FAILED. ENGINE WAS SENT TO THIS REPAIR STATION FOR REPAIR. ENGINE TC HOLDER N
- [SDR JYDR20201008272](https://openairdocs.org/sdr/JYDR20201008272.md): Blades · broken · Oct 7, 2020 · N176AC · Skrsky S64E · Turbine Section
  > PILOTS HEARD A NOISE COMING FROM NR 2 ENGINE AND RETURNED TO SERVICE LANDING. MAINTENANCE FOUND DEBRIS IN TAIL PIPE. ENGINE REMOVED AND IS BEING SHIPPED BACK TO THIS REPAIR STATION FOR INVESTIGATION. THIS IS A PRELIMINARY REPORT FOR REPORTING. ONCE ENGINE
- [SDR JYDR20200420109](https://openairdocs.org/sdr/JYDR20200420109.md): Turbine Blades · broken · Apr 19, 2020 · N176AC · Skrsky S64E · Turbine Section
  > DURING RE-FUELING PILOT REPORTED A STRANGE ENGINE NOISE. AFTER SHUTDOWN MECHANICS FOUND A SECOND STAGE N1 BLADE HAD BROKEN AND EXITED THROUGH THE FREE TURBINE. THIS IS A PRELIMINARY REPORT FOR MEETING REPORTING DEADLINE. ENGINE HAS NOT ARRIVED AT THIS REPAIR S
- [SDR JYDR20190423081](https://openairdocs.org/sdr/JYDR20190423081.md): Turbine Blades · broken · Apr 22, 2019 · Skrsky S64E · Turbine Section
  > ENGINE RECEIVED AT REPAIR STATION FOR REPAIR. FOUND 1 EACH 2ND STAGE N1 BLADE BROKEN AT ROOT. UNKNOWN CAUSE AT THIS TIME BECAUSE THIS REPORT MUST BE SUBMITTED FOR REPORTING TIME LIMITS.
- [SDR JYDR20190124023](https://openairdocs.org/sdr/JYDR20190124023.md): Disk · cracked · Jan 23, 2019 · Skrsky S64E · Turbine Engine Compressor Section
  > ENGINE WAS AT REPAIR STATION FOR OVERHAUL. NDT WAS COMPLIED WITH ON THE 3RD STAGE DISK REFERENCE OIS 352 REV N, 3/3/2015. 7EA. CRACK INDICATIONS WERE FOUND FROM A TIE-ROD HOLES USING EDDY CURRENT (REF SPM 585005 REV 143, 01/JUN/2018). THERE WERE 0 CRACK INDI
- [SDR JYDR20190107007](https://openairdocs.org/sdr/JYDR20190107007.md): Tab · broken · Jan 7, 2019 · Skrsky S64E · Turbine Engine Compressor Section
  > ENGINE WAS AT REPAIR STATION FOR SCHEDULED OVERHAUL. DURING TEAR DOWN A BROKEN TAB LOCK WAS DISCOVERED ON THE 4TH STAGE COMPRESSOR DISK. THIS CAUSED THE 4TH STAGE BLADE TO SHIFT AND RUB ON THE 4TH STAGE STATOR. THIS REPAIR STATION PREVIOUSLY SUBMITTED AN SDR,
- [SDR JYDR20181214347](https://openairdocs.org/sdr/JYDR20181214347.md): Disk · cracked · Dec 13, 2018 · N172AC · Skrsky S64E · Turbine Engine Compressor Section
  > ENGINE WAS RECEIVED AT REPAIR STATION FOR HOT SECTION AND AIRWORTHINESS COMPLIANCE (AD) UNDER WO 164822. DURING COMPLIANCE WITH AD 97-02-13 NDT INSPECTION, 2 EACH CRACKS WERE FOUND AT TIE ROD HOLES. AD CALLS FOR FIRST INSPECTION AT 3000 HOURS AND 1500 HOURS TH
- [SDR JYDR20181130332](https://openairdocs.org/sdr/JYDR20181130332.md): Blades · broken · Nov 28, 2018 · N247AC · Skrsky S64E · Turbine Section
  > THIS IS A PRELIMINARY REPORT TO MEET REPORTING REQUIREMENTS. THE ENGINE IS CURRENTLY BEING SHIPPED TO THIS REPAIR STATION FROM CANADA. MORE INFORMATION WILL BE PROVIDED AFTER TEAR DOWN. PILOTS REPORTED VISUAL LOSS OF OIL ON AIRCRAFT RIGHT HAND LANDING GEAR LEG
- [SDR JYDR20170628176](https://openairdocs.org/sdr/JYDR20170628176.md): Turbine Blades · missing · Jun 27, 2017 · Skrsky S64E · Turbine Engine Combustion Section
  > PILOT RETURNED TO LANDING REPORTING NOISE AND VIBRATION IN NR 1 ENGINE. AFTER SEPARATING FREE TURBINE FROM ENGINE DISCOVERED ONE EACH SECOND STAGE N1 TURBINE BLADE MISSING FROM ROOT OUT. DOWNSTREAM DAMAGE IN FREE TURBINE. BOTH COMPRESSOR AND FREE TURBINE REPLA
- [SDR JYDR20170428115](https://openairdocs.org/sdr/JYDR20170428115.md): Blade · cracked · Apr 28, 2017 · Skrsky S64E · Turbine Engine Compressor Section
  > ENGINE AT REPAIR STATION FOR OVERHAUL. DURING FPI INSPECTION A CRACK WAS DETECTED ON INBOARD SIDE OF PLATFORM ON DOVE TAIL. CRACK WAS APPROXIMATELY.025 INCH IN LENGTH AXIALLY. AFTER OVERHAULING HUNDREDS OF THESE MODEL ENGINES, THIS IS THE FIRST TIME THIS REPA
- [SDR JYDR20170306065](https://openairdocs.org/sdr/JYDR20170306065.md): Bolt · broken · Mar 6, 2017 · N176AC · Skrsky S64E · Rotorcraft Tail Boom
  > DURING POST FLIGHT, MECHANIC FOUND A DING IN THE LEADING EDGE OF 1 TAIL ROTOR BLADE. FURTHER INSPECTION REVEALED A BROKEN STABILIZER BOLT HEAD. TRB WAS REPLACED. AIRCRAFT MANUFACTURE WAS CONTACTED FOR AN DER APPROVED REPAIR. AFTER AUTHORIZED REPAIR WAS PERFOR
- [SDR JYDR20170321001](https://openairdocs.org/sdr/JYDR20170321001.md): Gearbox · failed · Jan 1, 2017 · N217AC · Skrsky S64E · Main Rotor Gearbox
  > DURING A NORMAL START PROCEDURE, WITH THE NR 1 ENGINE AT GROUND IDLE AND JUST PRIOR TO THE ROTOR BRAKE BEING RELEASED, A FAILURE OCCURRED IN THE MAIN GEARBOX THAT ALLOWED MOMENTARY ROTATION AND SUBSEQUENT LOCKING OF THE MGB. THE ROTOR SYSTEM BARELY MOVED BEFOR
- [SDR JYDR20161128318](https://openairdocs.org/sdr/JYDR20161128318.md): Blade · unbonded · Nov 28, 2016 · N247AC · Skrsky S64E · Tail Rotor Blades
  > TAIL ROTOR BLADE CAUSED VIBRATION ON AIRCRAFT. UPON DISASSEMBLY AT REPAIR STATION, A LARGE AMOUNT OF WATER WAS FOUND IN THE FAIRING. THE WATER WAS ALLOWED ENTRY BECAUSE OF A FAILURE IN A BOND LINE.
- [SDR JYDR20150814209](https://openairdocs.org/sdr/JYDR20150814209.md): Lock Tab · missing · Aug 13, 2015 · Skrsky S64E · Turbine Engine Compressor Section
  > DURING INSPECTION OF COMPRESSOR CORE IT WAS NOTED THAT ONE 5TH STAGE BLADE TAB LOCK WAS MISSING AND THAT BLADE HAD MOVED AFT IN THE DISK MAKING CONTACT WITH THE FORWARD FACE OF THE 5TH STAGE STATOR. A PORTION OF THE MISSING TAB LOCK WAS LATER FOUND AFT IN THE
- [SDR JYDR20150611153](https://openairdocs.org/sdr/JYDR20150611153.md): Ring Gear · loose · Jun 11, 2015 · N247AC · Skrsky S64E · Main Rotor Gearbox
  > MAIN GEAR BOX WAS RECEIVED FOR OVERHAUL. DURING DISASSEMBLY IT WAS FOUND THAT 1EA NUT, MS14182P06 HAD BACKED OFF OF 1EA BOLT MS14181-06010P THAT HOLDS THE SECOND STAGE RING GEAR TO THE SHAFT. THE NUT DID NOT COME OFF THE BOLT. THIS CAUSED DAMAGE TO THE INTE
- [SDR JYDR20150408085](https://openairdocs.org/sdr/JYDR20150408085.md): Turbine · loose · Apr 7, 2015 · N172AC · Skrsky S64E · Turbine Section
  > FREE TURBINE ASSY WAS AT REPAIR STATION FOR A LEAK REPAIR. DURING DISASSEMBLY THE NUT THAT HOLDS THE 6435-20072-101 DRIVE FLANGE WAS FOUND TO BE LOOSE. FURTHER INVESTIGATION SHOWED THAT THE FLANGE HAD PAINT ON THE MATING SURFACES. TORQUEING THE NUT AGAINST PA
- [SDR JYDR2014030600439](https://openairdocs.org/sdr/JYDR2014030600439.md): Bearing · spalled · Mar 6, 2014 · N247AC · Skrsky S64E · Main Rotor Gearbox
  > MAIN GEAR BOX WAS REMOVED FROM ACFT, DUE TO MAKING METAL AFTER A CHIP LIGHT DURING FLIGHT. DISASSEMBLY OF MGB AT REPAIR STATION REVEALED THAT LT (NR 1) 2ND STAGE INPUT ALIGNMENT BEARING HAD FAILED. THIS BEARING IS NORMALLY NOT A RECURRING PROBLEM.
- [SDR JYDR2013FA0000586](https://openairdocs.org/sdr/JYDR2013FA0000586.md): Lock Tab · broken · Oct 3, 2013 · N957AC · Skrsky S64E · Turbine Engine Compressor Section
  > DURING TEARDOWN OF THE COMPRESSOR CORE THERE WAS EXTENSIVE DAMAGE TO BLADES AND VANES FROM THE 3RD STAGE AFT. THE DAMAGE OCCURED WHEN THE AFT END OF A 3RD STAGE TABLOCK BROKE ALLOWING THE 3RD STAGE BLADE TO MOVE AFT CONTACTING THE 4TH STAGE STATOR. THE BLADE T
- [SDR JYDR2013FA0000420](https://openairdocs.org/sdr/JYDR2013FA0000420.md): Compressor Wheel · cracked · Jul 26, 2013 · N229AC · Skrsky S64E · Turbine Engine Compressor Section
  > COMPRESSOR WAS BEING OVERHAULED. DURING NDT CRACKS WERE FOUND AT THE TIE ROD HOLES.
- [SDR JYDR2013FA0000421](https://openairdocs.org/sdr/JYDR2013FA0000421.md): Compressor Wheel · cracked · Jul 26, 2013 · N154AC · Skrsky S64E · Turbine Engine Compressor Section
  > COMPRESSOR WAS BEING OVERHAULED. DURING NDT CRACKS WERE FOUND AT THE TIE ROD HOLES.
- [SDR 2013FA0000416](https://openairdocs.org/sdr/2013FA0000416.md): Lock · broken · Jul 18, 2013 · N218AC · Skrsky S64E · Turbine Engine Compressor Section
  > ENGINE REMOVED, DURING DISASSEMBLY MINOR DAMAGE WAS NOTED ON THE BLADES AND VANES AFT IF 5TH STAGE. THE DAMAGE WAS CAUSED BY A 5TH STAGE DISK TAB LOCK THAT HAD BROKEN AND ALLOWED THE BLADE TO MOVE AFT IN THE DISK MAKING CONTACT WITH THE 6TH STAGE STATOR.
- [SDR 2011FA0000703](https://openairdocs.org/sdr/2011FA0000703.md): Blade · cracked · Aug 29, 2011 · N194AC · Skrsky S64E · Main Rotor Blades
  > AT FIRST BIM CHECK, PILOTS REPORTED HEARING A CHIRPING NOISE COMING FROM THE MAIN ROTOR BLADES. INSPECTED BLADES. FOUND THE TIP WEIGHT ON MAIN ROTOR BLADE PROTRUDING THROUGH THE TIP CAP. BLADE WAS REPLACED. OPEN
- [SDR 2011FA0000704](https://openairdocs.org/sdr/2011FA0000704.md): Blades · fractured · Jun 10, 2011 · N172AC · Skrsky S64E · Turbine Engine Compressor Section
  > AFTER ABOUT 1.5 HRS OF FLIGHT, THE PILOTS RETURNED TO LANDING AND SAID THAT THE NR1 ENGINE HAD A HIGH FREQUENCY RUMBLE AND JUST BEFORE LANDING, THE TQ AND EPR GAUGES DECRESED RAPIDLY, WHILE THE ENGINE TEMP AND OIL IND WERE STILL GREEN. AFTER SHUTDOWN, THE INLE
- [SDR CA100323004](https://openairdocs.org/sdr/CA100323004.md): Engine · failed · Mar 8, 2010 · Skrsky S64E · Engine (Turbine/Turboprop)
  > ACFT WAS INVOLVED IN AERIAL TIMBER HARVESTING OPERATIONS. WHILE THE ACFT WAS DESCENDING TO THE LOG LANDING AT A RATE OF 200 TO 300 FT PER MINUTE AND AN AIRPSEED OF 20 KNOTS THE FLIGHT CREW HEARD A "SWOOSH" SOUND AND THEN WERE ALTERTED BY AN ENGINE LOW N1 RPM
- [SDR CA100119008](https://openairdocs.org/sdr/CA100119008.md): Blade · dislodged · Jan 15, 2010 · Skrsky S64E · Turbine Engine Compressor Section
  > (CAN) COMPRESSOR WAS REMOVED FROM ACFT FOR HIGH VIBRATION. COMPRESSOR HAD 20.3 HOURS SINCE INSTALL AND LAST HOT SECTION INSP. UPON DISASSEMBLY, DAMAGE WAS FOUND TO VARIOUS STATORS, BLADES, BLEED BAND, AND OTHER PARTS. THE DAMAGE WAS CUASED BY A 4TH STAGE COMP
- [SDR CA080925006](https://openairdocs.org/sdr/CA080925006.md): Engine · malfunctioned · Sep 8, 2008 · Skrsky S64E · Engine (Turbine/Turboprop)
  > (CAN) WHILE DEPARTING AREA WITH AN AIRSPEED OF 30 TO 40 KNOTS AND A 500 FT PER MINUTE RATE OF DESCENT, NR 2 ENGINE N1 LOW RPM AUDIO HORN SOUNDED ALONG WITH ILLUMINATION OF NR 2 ENGINE LOW OIL PRESSURE LIGHT. A SCAN OF THE ENGINE GAUGES REVEALED THE NR 2 ENGIN
- [SDR CA080925007](https://openairdocs.org/sdr/CA080925007.md): Fuel Control · failed · Sep 8, 2008 · Skrsky S64E · Fuel Control/Turbine Engines
  > (CAN) LIGHT A SCAN OF THE ENG GAUGES REVEALED THE NR 2 ENGINE HAD LOW N1 RPM WITH A CLIMBING T5 TEMP. FLIGHT CREW IDENTIFIED THE PROBLEM AS AN ENG ROLL BACK AND ONCE THE LOAD WAS SAFELY JETTISONED A SHUTDOWN OF THE NR (2) ENGINE WAS CARRIED OUT. THE ACFT THE
- [SDR CA081105002](https://openairdocs.org/sdr/CA081105002.md): Engine · overtemp · Sep 8, 2008 · Skrsky S64E · Engine (Turbine/Turboprop)
  > (CAN) WHILE DEPARTING AREA WITH AN AIRSPEED OF 30 TO 40 KNOTS AND A 500 FT PER MINUTE RATE OF DESCENT, NR 2 ENG N1 LOW RPM AUDIO HORN SOUNDED ALONG WITH ILLUMINATION OF NR 2 ENG LOW OIL PRESSURE LIGHT. A SCAN OF ENG GAUGES REVEALED NR 2 ENG HAD LOW N1 RPM WIT
- [SDR CA080530001](https://openairdocs.org/sdr/CA080530001.md): Servo · loose · May 29, 2008 · Skrsky S64E · Rotorcraft Servo System
  > (CAN) DURING A POST-FLIGHT INSP, MECHANIC FOUND MOVEMENT BETWEEN THE FORK AND PISTON. THE PRIMARY SERVO WAS REPLACED. AFTER DISASSEMBLY AT REPAIR STATION, IT WAS DISCOVERED THAT THE MOVEMENT WAS CAUSED BY THE BREAKDOWN OF A LAMINATED REPAIR SHIM INSTALLED BET
- [SDR H3V2007F00000](https://openairdocs.org/sdr/H3V2007F00000.md): Pin · missing · Jul 8, 2007 · N44094 · Skrsky CH54A · Main Rotor Gearbox
  > ON JULY 8, 2007, HLH EXPERIENCED A HARD GROUND ROLLOVER OF AC. INITIAL INSPECTION OF THE WRECKAGE REVEALED A SERVO PIN, PN 6465-20201-101, FROM THE LT LATERAL SERVO, PN S1565-20421-042, WAS MISSING FROM THE TRANSMISSION LUG CAUSING THE SERVO TO REMOVE ITSELF
- [SDR CA061218007](https://openairdocs.org/sdr/CA061218007.md): Oil System · malfunctioned · Dec 2, 2006 · Skrsky S64E · Engine Oil Pressure
  > (CAN) THE AIRCRAFT WAS INVOLVED IN HELICOPTER LOGGING OPERATIONS. AS THE AIRCRAFT WAS APPROACHING THE LOG LANDING WITH A LOAD, THE FLIGHT CREW WERE ALERTED BY A LOW OIL PRESSURE WARNING LIGHT FOR THE NR (2) ENGINE. A SCAN OF THE CORRESPONDING OIL PRESSURE IND
- [SDR CA061218010](https://openairdocs.org/sdr/CA061218010.md): Bolt · damaged · Nov 21, 2006 · Skrsky S64E · Rotorcraft Tail Boom
  > (CAN) THE AIRCRAFT WAS INVOLVED IN HELICOPTER LOGGING OPERATIONS. THE YARDING PROFILE WAS A DOWN HILL FLIGHT FROM THE HARVEST CUT BLOCK TO A ROAD SIDE LOG LANDING. AFTER ENCOUNTERING DOWN FLOWING WIND CONDITIONS THROUGH OUT THE FIRST LOGGING CYCLE OF THE DAY
- [SDR 2006FA0001137](https://openairdocs.org/sdr/2006FA0001137.md): Turbine Blades · fractured · Nov 6, 2006 · Skrsky S64E · Turbine Section
  > (REF NR: MDR06-092) VIBRATION FELT BY CREW, UPON LANDING, MAINTENANCE PERSONNEL FOUND METAL PARTICLES IN NR 2 ENGINE EXHAUST. UPON CLOSER EXAMINATION, A 2ND STAGE TURBINE BLADE WAS FOUND TO BE FRACTURED APPROXIMATELY 1 INCH FROM THE ROOT. THE FRACTURED PIEC
- [SDR CA061018003](https://openairdocs.org/sdr/CA061018003.md): Rod · broken · Oct 10, 2006 · Skrsky S64E · Main Rotor Head
  > (CAN) THE AIRCRAFT WAS INVOLVED IN AERIAL LOGGING OPERATIONS AND HAD JUST SHUT DOWN FOR IT’S MIDDAY MAINTENANCE. THIS MAINTENANCE INVOLVES A FLUID LEVELS CHECK, SERVICING AND INSPECTION OF CRITICAL AREAS ON THE AIRCRAFT. ON THIS PARTICULAR DAY THE MAIN ROTOR D
- [SDR CA061011013](https://openairdocs.org/sdr/CA061011013.md): Turbine Blades · broken · Oct 7, 2006 · Skrsky S64E · Turbine Section
  > (CAN) THE AIRCRAFT WAS INVOLVED IN AERIAL LOGGING OPERATIONS, ON A SHORT FINAL APPROACH TO THE LOG LANDING THE AIRCRAFT DEVELOPED A VERY NOTICEABLE HIGH FREQUENCY VIBRATION THAT WAS FELT BY THE FLIGHT CREW THROUGHOUT THE AIRCRAFT INCLUDING THE FLIGHT CONTROLS.
- [SDR 2006FA0001135](https://openairdocs.org/sdr/2006FA0001135.md): Bearing · cracked · Oct 6, 2006 · N247AC · Skrsky S64E · Main Rotor Gearbox
  > (REF NR:MDR06-090) MAIN GEARBOX PN 6435-20400065, SN A6-011 WAS REMOVED DUE TO FINDINGS OF FERROUS METAL IN THE OIL SCREEN AND FILTER. UPON DISASSEMBLY AND TEAR DOWN, THE SOURCE OF THE FERROUS METAL WAS DISCOVERED TO BE COMING FROM GHE SECOND STAGE INPUT AL
- [SDR 2006FA0001136](https://openairdocs.org/sdr/2006FA0001136.md): Bearing · cracked · Oct 6, 2006 · N229AC · Skrsky S64F · Tail Rotor Gearbox
  > (REF NR MDR06-089) THE IGB CHIP DETECTOR INDICATED A CHIP LIGHT. IGB WAS REMOVED AND THE INNER RACE WAS FOUND TO BE CRACKED THROUGH AND SPALLED. PROBABLE CAUSE: UNKNOWN. (K)
- [SDR CA060704011](https://openairdocs.org/sdr/CA060704011.md): Fuel Control · failed · Jun 28, 2006 · Skrsky S64E · Fuel Control/Turbine Engines
  > (CAN) AFTER SETTING A TURN OF LOGS DOWN ON LOG LANDING WITH A LT CROSS WIND, ACFT TURNED FULLY INTO WIND & BEGAN A CLIMB BACK UP HILL TO LOGGING UNIT WITH APPROXIMATELY 60% TORQUE INDICATED. AFTER ABOUT 7-10 SECONDS INTO CLIMB, N1 UNDERSPEED WARNING HORN SOUN
- [SDR CA060621001](https://openairdocs.org/sdr/CA060621001.md): Engine · failed · Jun 15, 2006 · Skrsky S64E · Engine (Turbine/Turboprop)
  > A/C INVOLVED IN HELI-LOGGING OPS WITH A/C IN HOVER MADE A MODERATE PWR REDUCTION TO REPOSITION GRAPPLE ON A LOG. AS PWR WAS REDUCED A "WHOOSH" SOUND WAS HEARD AND N1 WARNING HORN ACTIVATED FOR NR 2 ENG. FLT CREW IDENTIFIED AND CONFIRMED THAT NR 2 ENG ENCOUNTE
- [SDR 2006FA0000795](https://openairdocs.org/sdr/2006FA0000795.md): Spar · cracked · May 24, 2006 · N229AC · Skrsky S64E · Tail Rotor Blades
  > (REF NR: MDR06-088) IB SIDE OF SPAR ON TRAILING EDGE HAS A CRACK. THE CRACK IS APPROX.482 INCH LONG AND RUNS FROM TIP END OF BLADE, DOWN INTO THE SCREW HOLE COUNTERSINK. BLADE HAS ACCUMULATED 660.4 HOURS SINCE LAST REPAIR. (K)
- [SDR CA051102003](https://openairdocs.org/sdr/CA051102003.md): Engine · failed · Oct 29, 2005 · Skrsky S64E · Fuel Control/Turbine Engines
  > (CAN) AFTER SLIGHT REDUCTION IN PWR SETTING PILOT HEARD A WHOOSH SOUND FOLLOWED BY N1 LOW RPM AUDIO WARNING HORN. CO-PILOT IDENTIFIED NR1 ENG IN A ROLLBACK CONDITION WITH A DECREASING N1 SPEED AND AN INCREASING T5 TEMP. AFTER VERIFICATION, EXECUTED A SHUTDOWN
- [SDR CA051102002](https://openairdocs.org/sdr/CA051102002.md): Fuel Control · failed · Oct 27, 2005 · Skrsky S64E · Fuel Control/Turbine Engines
  > (CAN) PILOT ELECTED TO BACK AC OUT AWAY FROM LOG LANDING. AS AC STARTED ITS REARWARD DESCENT DOWN TO LOGGING BLOCK, PILOT HEARD WHOOSH SOUND FOLLOWED BY AN ENG LOW RPM AUDIO WARN HORN. NR 2 ENG WAS IN ROLLBACK CONDITION W/DECREASING N1 SPEED, INCREASING T5 TEM
- [SDR CA051013004](https://openairdocs.org/sdr/CA051013004.md): Clamp · misinstalled · Sep 23, 2005 · Skrsky S64E · Main Rotor Gearbox
  > (CAN) DURING GROUND RUN PHASE OF MAIN GB REPLACEMENT, NR 2 GEN VESPAL DRIVE SPLINE ADAPT STRIPPED OUT CAUSING GEN TO FALL OFF LINE. GEN WAS REMOVED FROM ACCY GB, DRIVE SPLINE ADAPTOR WAS REPLACED, GEN WAS REINSTALLED, FUNCTION TESTED. AC WAS RETURNED TO SERVI

Next page: https://openairdocs.org/engine/pratt-whitney-jftd12a-4a/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 engine_model_key = 'JFTD12A4A'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/pratt-whitney-jftd12a-4a/reports

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