# Service difficulty reports: JASC 6322

A list on [JASC 6322](https://openairdocs.org/jasc/6322.md).

Reports filed under 6322 · Rotorcraft Cooling Fan System, newest first.

Page 1 of 5 · 213 reports

- [SDR AC2A2025122013901](https://openairdocs.org/sdr/AC2A2025122013901.md): Cooling Fan · sheared · Dec 19, 2025 · N639CF · Agusta AW139
  > DURING TAXI IN FROM RUNWAY, MGB TEMP WARNING ILLUMINATED.
- [SDR YV3R2023112200587](https://openairdocs.org/sdr/YV3R2023112200587.md): Fanwheel · defective · Nov 11, 2023 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 BOLTS WERE LOOSE WITHIN 5.0 HOURS.
- [SDR 8HBR20220228041](https://openairdocs.org/sdr/8HBR20220228041.md): None · cracked · Jan 19, 2022 · N924SH · Robsin R22BETA
  > THE ENGINE COOLING FAN WHEEL WAS REMOVED TO FACILITATE OTHER MAINTENANCE AND A CRACK WAS FOUND ON THE FAN AT A BALANCE BOLT HOLE.
- [SDR AC2A2021101513902](https://openairdocs.org/sdr/AC2A2021101513902.md): Cooling Fan · contaminated · Oct 15, 2021 · N139FW · Agusta AB139
  > MAIN GEARBOX OIL COOLER FAN WAS REMOVED AND REPLACED DUE TO MGB FAN QUILL SEAL LEAKING ALLOWING OIL TO MIGRATE TO FAN BEARINGS. SEE SDR AC2A2021101513901 FOR SDR ON SEAL.
- [SDR AC2A2021101513901](https://openairdocs.org/sdr/AC2A2021101513901.md): Seal · leaking · Oct 15, 2021 · N139FW · Agusta AB139
  > MAIN GEARBOX OIL COOLER FAN DRIVE SEAL LEAKING
- [SDR AC2A2021061013901](https://openairdocs.org/sdr/AC2A2021061013901.md): Cooling Fan · leaking · Apr 24, 2021 · N139FW · Agusta AB139
  > OIL COOLER FAN WAS REMOVED AND REPLACED DUE TO MGB FAN QUILL SEAL LEAKING ALLOWING OIL TO MIGRATE TO FAN BEARINGS. TEARDOWN REPORT INDICATES BEARINGS WORN AND REPLACED WITH ONLY 284.4 HOURS SINCE OVERHAUL.
- [SDR YV3R2020111400386](https://openairdocs.org/sdr/YV3R2020111400386.md): Fanwheel · cracked · Nov 11, 2020 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 WAS CRACKED.
- [SDR AC2A2021061013903](https://openairdocs.org/sdr/AC2A2021061013903.md): Cooling Fan · leaking · Oct 11, 2020 · N139FW · Agusta AB139
  > OIL COOLER FAN WAS REMOVED AND REPLACED DUE TO MGB FAN QUILL SEAL LEAKING ALLOWING OIL TO MIGRATE TO FAN BEARINGS. TEARDOWN REPORT INDICATES BEARINGS WORN AND REPLACED WITH ONLY 13.7HOURS SINCE LAST OVERHAUL
- [SDR YV3R2020101400366](https://openairdocs.org/sdr/YV3R2020101400366.md): Fanwheel · cracked · Oct 8, 2020 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 WAS FOUND CRACKED.
- [SDR YV3R2020101400365](https://openairdocs.org/sdr/YV3R2020101400365.md): Fanwheel · cracked · Oct 8, 2020 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 WAS FOUND CRACKED.
- [SDR YV3R2020072400307](https://openairdocs.org/sdr/YV3R2020072400307.md): Fanwheel · cracked · Jul 21, 2020 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 CONE P/N: A187-4 WAS FOUND CRACKED.
- [SDR AC2A2021061013902](https://openairdocs.org/sdr/AC2A2021061013902.md): Cooling Fan · leaking · Jul 3, 2020 · N139FW · Agusta AB139
  > OIL COOLER FAN WAS REMOVED AND REPLACED DUE TO MGB FAN QUILL SEAL LEAKING ALLOWING OIL TO MIGRATE TO FAN BEARINGS. TEARDOWN REPORT INDICATES BEARINGS WORN AND REPLACED WITH ONLY 464.1 HOURS SINCE OVERHAUL.
- [SDR YV3R2019012200080](https://openairdocs.org/sdr/YV3R2019012200080.md): Fanwheel · cracked · May 7, 2019 · Robsin R22BETAII
  > CUSTOMER REPORTED FANWHEEL ASSEMBLY P/N: B174-1 WAS CRACKED.
- [SDR YV3R2019031600047](https://openairdocs.org/sdr/YV3R2019031600047.md): Bolt · loose · Mar 12, 2019 · Robsin R22BETAII
  > CUSTOMER REPORTED HUB BOLTS WERE FOUND LOOSE.
- [SDR 2019FA0000010](https://openairdocs.org/sdr/2019FA0000010.md): Hub · unserviceable · Jan 11, 2019 · N252CS · Robsin R22BETAII
  > A POST FLIGHT INSPECTION OF THE DRIVE SYSTEM WAS PERFORMED AFTER ENCOUNTERING A FLICKERING CLUTCH LIGHT. DURING THE INSPECTION, THE FANWHEEL HUB ATTACHING HARDWARE WAS FOUND FRETTING AND LOOSE.
- [SDR 8HBR20170406002](https://openairdocs.org/sdr/8HBR20170406002.md): Hub · cracked · Mar 31, 2017 · N779SH · Robsin R22BETAII
  > DURING THE REPLACEMENT OF THE CRANKSHAFT SEAL THE AIRCRAFT FANWHEEL WAS REMOVED AND THE MOUNTING HUB WAS FOUND CRACKED. IN ADDITION, THE FANSHAFT WAS GOUGED FROM THE CRACK IN THE FANWHEEL MATING SURFACE. BOTH COMPONENTS WERE REPLACED. THE CAUSE OF THE CRACK I
- [SDR AC2R2016120501](https://openairdocs.org/sdr/AC2R2016120501.md): Bearing · rough · Dec 5, 2016 · N639GG · Agusta AW139
  > REMOVED OIL COOLER FAN FOR OVERHAUL. ROTATED FAN BY HAND. FOUND BEARING TO BE ROUGH.
- [SDR AC2R2016112901](https://openairdocs.org/sdr/AC2R2016112901.md): Fan · failed · Nov 21, 2016 · N639WW · Agusta AW139
  > MGB OIL TEMP WARNING CAS MESSAGE CAME ON IN FLIGHT APPROX. 10 MINUTES AFTER TAKE OFF FROM OFFSHORE LOCATION. FOUND MGB OIL COOLER NOT ENGAGED TO MGB. FOUND MGB OIL COOLER FAN SHAFT BEARING FAILED. REPLACED OIL COOLER FAN AND OIL COOLER.
- [SDR CHIR201606152436](https://openairdocs.org/sdr/CHIR201606152436.md): Seal · failed · Jun 14, 2016 · N6674D · Boeing 1072
  > THE AFT TRANSMISSION, PN 107D2010-34, SN TA-9-22 WAS REMOVED FROM ACFT FOR A SCHEDULED INSPECTION. WHILE IN THE SHOP, THE BLOWER DRIVEN SEAL RETAINER WAS REMOVED FROM THE MIX BOX TRANSMISSION, PN: 107D2004-19, SN: A-11-111 IN ORDER TO SEE IF THE BLOWER DRIVEN
- [SDR CHIR020166062396](https://openairdocs.org/sdr/CHIR020166062396.md): Garlock Seal · failed · Jun 6, 2016 · N6682D · Dhav DHC2MK3
  > DURING AN INSPECTION, MECHANIC REMOVED AFT TRANSMISSION LUBE FILTER AND NOTICED LARGE METALLIC CHIPS IN THE FILTER HOUSING AND ON THE FILTER PACKS. DISASSEMBLED FILTER AND FOUND MORE CHIPS. REMOVED BLOWER DRIVE SHAFT AND INPUT COVER ON THE TRANSMISSION TO DE
- [SDR CA151127011](https://openairdocs.org/sdr/CA151127011.md): Bearing · failed · Nov 11, 2015 · Robsin R22BETA
  > (CAN) PILOT NOTICED SMOKE IN THE COCKPIT WHILE IN FLIGHT. HELICOPTER WAS LANDED SAFELY. LOWER ACTUATOR BEARING ASSY WAS FOUND TO HAVE SHIFTED REARWARD ON FANSHAFT CAUSING BEARING HOUSING TO COME INTO CONTACT WITH FANWHEEL. ROTATING FANWHEEL ASSEMBLY BOLTS GR
- [SDR 2015FA0000292](https://openairdocs.org/sdr/2015FA0000292.md): Bearing · damaged · Jun 29, 2015 · N7087J · Robsin R22BETA
  > DURING FLIGHT THERE WAS REPORT OF AN ABNORMAL VIBRATION AS WELL AS AN INTERMITTENT CLUTCH LIGHT INDICATION. MAINTENANCE PERFORMED A FAN BALANCE, DURING THE MAINTENANCE RUN-UP THERE WAS A NOTICEABLE NOISE COMMON TO BEARING FAILURE AND AN INCREASING VIBRATION.
- [SDR CHIR201410151754](https://openairdocs.org/sdr/CHIR201410151754.md): Case · cracked · Oct 14, 2014 · N242CH · Boeing 234
  > CASE ASSEMBLY AT WEB OR LINER 247 HAS INDICATION OF A CRACK APPROXIMATELY 1.5" LONG. CRACK AT HOUSING IN PREVIOUS WELD REPAIR LOCATED NEAR ROTOR BRAKE HOUSING SUPPORT BORE. CRACK IS LOCATED ON OUTSIDE OF HOUSING.
- [SDR CA140414011](https://openairdocs.org/sdr/CA140414011.md): Bearing · lack of lube · Apr 14, 2014 · Robsin R44RAVENII
  > (CAN) DURING THE 50 HOUR INSPECTION OF THE HELICOPTER, THE LOWER FAN SHAFT BEARING WAS FOUND TO BE EXTRUDING A BLACK RESIDUE. THE LOWER BEARING WOULD NORMALLY SHOW SOME LEAKAGE OF GREASE DURING THE FIRST FEW HUNDRED HOURS OF BREAK-IN. SUSPECT THE BEARING ASS
- [SDR CA110718013](https://openairdocs.org/sdr/CA110718013.md): Fan · failed · Jun 30, 2011 · Bell 206L4
  > DURING A FLIGHT THE PILOT REPORT SHUTDOWN NR 2 ENGINE BECAUSE OF OIL OVERTEMP UP TO 150 DEGREES AND ABOVE 120 DEGREES FOR 2 MIN. LANDED SAFELY. CAUSE WAS COOLER FAN FAILED. T
- [SDR 2009FA0000947](https://openairdocs.org/sdr/2009FA0000947.md): Blower · failed · Oct 30, 2009 · N761MH · Skrsky S76A
  > ON A RETURN FLT BACK TO HOME BASE, AT APPROXIMATELY 2130-2200 HRS, CREW DETECTED AN ELECTRICAL BURNING ODOR. IT WAS IMMEDIATELY FOLLOWED BY A MASTER CAUTION LIGHT WITH A NR 1 HYD SERVO LIGHT ASSOCIATED WITH LOUD THUMPS FROM NOSE GEAR. IMMEDIATLEY FOLLWED BY A
- [SDR CA081107001](https://openairdocs.org/sdr/CA081107001.md): Mount · cracked · Nov 4, 2008 · Robsin R22BETAII
  > (CAN) AT REINSTALLATION OF FANWHEEL ASSEMBLY, FOUND TAPERED MOUNTING FLANGE COMPLETELY CRACKED LONGITUDINALLY. UNIT SENT TO MANUFACTURER FOR WARRANTY EXCHANGE.
- [SDR 2008FA0000741](https://openairdocs.org/sdr/2008FA0000741.md): Nut · backed out · Oct 26, 2008 · N5185G · Hughes 369FF
  > OIL COOLER BLOWER DRIVEN PULLEY RETAINING NUT IS BACKING OFF OF SHAFT DURING NORMAL US. NUT IS A STAINLESS STEEL, SILVER PLATED, ALL METAL SELF LOCKING TYPE NUT. THIS WAS THE THIRD OCCURRENCE OF THIS TYPE FOR OUR UNIT AND WE ARE ALSO CAUSES THE SHAFT BEARING
- [SDR CA080407007](https://openairdocs.org/sdr/CA080407007.md): Gear Set · sheared · Apr 5, 2008 · Bell 47G4
  > APPROX 100 HRS AGO TRANSMISSION WAS O/H AND NEW PMA GEAR SET WAS INSTALLED S/N GR586A FROM HELICOPTER TECH DURING FLIGHT PILOT HEARD AND FELT NOISE AND MADE A PRECAUTIONARY LANDING AND FOUND COOLING FAN DRIVE PULLEY AND APPROX 1.25 INCHES OF THE DRIVE SHAFT WA
- [SDR M7K2008F00080](https://openairdocs.org/sdr/M7K2008F00080.md): Blower Motor · seized · Sep 19, 2007 · N817MH · Urocop EC130B4
  > PILOT REPORTED BLOWER VERY NOISY/GROWLS IN OPERATION. CLOSER EXAMINATION REVEALED VERY ROUGH SHAFT BEARING. A NEW REPLACEMENT MOTOR WAS INSTALLED. THIS BLOWER MOTOR IS USUALLY VERY RELIABLE IF A BIT NOISY IN NORMAL OPERATION. LIKELY CAUSE IS POOR QUALITY O
- [SDR CA060322009](https://openairdocs.org/sdr/CA060322009.md): Belt · failed · Mar 8, 2006 · Hughes 369D
  > (CAN) DURING A 100 HOUR INSPECTION THE BLOWER BELT WAS NOTED AS HAVING SEVERAL TEETH MISSING. BELT IS IDENTIFED WITH THE PN IN WHITE MARKER. BELT TENSION WAS VERIFIED AFTER INSTALLATION AND NO DEFECTS WERE NOTED DURING THE NEXT 3-100 HOUR INSPECTIONS. NO VIBRA
- [SDR KBM2005F00221](https://openairdocs.org/sdr/KBM2005F00221.md): Motor · ratcheting · Jun 23, 2005 · N350SH · Snias AS350B2
  > MOTOR, MAKING RATCHETING NOISE. REMOVED AND REPLACE. (K)
- [SDR KBM2005F00136](https://openairdocs.org/sdr/KBM2005F00136.md): Motor · ratcheting · Jun 23, 2005 · N350SH · Snias AS350B2
  > MOTOR, MAKING RACHETING NOISE. REMOVED AND REPLACED. (K)
- [SDR CA050216010](https://openairdocs.org/sdr/CA050216010.md): Hanger Assy · rotated · Sep 11, 2004 · Bell 206B
  > (CAN) PILOT REPORTED A HIGH FREQUENCY VIBRATION. UPON INVESTIGATION, THE BEARING IN THE FORWARD HANGER ASSEMBLY OF THE OIL COOLER BLOWER WAS FOUND TO BE ROTATING. BLOWER ASSEMBLY REPLACED.
- [SDR CA040811008](https://openairdocs.org/sdr/CA040811008.md): Blower · damaged · Aug 5, 2004 · Aerosp AS355F1
  > (CAN) DURING OPERATION A NOISE WAS HEARD FROM THE BACK OF THE AIRCRAFT, AIRCRAFT WAS LANDED AND DURING INSPECTION TO DETERMINE THE ORIGIN OF THE SOUND IT WAS NOTED THAT THE OIL COOLER BLOWER ASSY WAS DAMAGED AND HAD SEVERAL PIECES MISSING. THE AIRCRAFT WAS RET
- [SDR CA040120002](https://openairdocs.org/sdr/CA040120002.md): Hub · galled · Jan 19, 2004 · Robsin R44
  > (CAN) OTHER PART AFFECTED LOWER BEARING C181-3 S/N 1328 UPON REMOVING FAN ASSY FOR ACCESS TO A DEFECTIVE ACTUATOR C051-1, DAMAGE (FRETTING AND GALLING) WAS DISCOVERED ON BOTH MATING FLANGE OF FAN HUB C186-1 (PART OF D174-2 ASSY) AND LOWER BEARING C181-3. NO PR
- [SDR HEEA086701](https://openairdocs.org/sdr/HEEA086701.md): Blower · inoperative · May 22, 2003 · N8045T · Bell 214ST
  > NR 2 ENGINE BLOWER OFF CAUTION LIGHT ILLUMINATED IN FLIGHT. TO BE SENT TO VENDOR FOR REPAIR.
- [SDR HEEA083538](https://openairdocs.org/sdr/HEEA083538.md): Blower · damaged · Jan 13, 2003 · N1546G · Skrsky S76A
  > RIVETS LOOSE ON HOUSING. REPLACED WITH SERVICEABLE PART.
- [SDR HEEA082566](https://openairdocs.org/sdr/HEEA082566.md): Shaft · broken · Dec 6, 2002 · N59806 · Bell 214ST
  > NR 2 ENGINE PARTICLE SEPERATOR BLOWER SHAFT BROKEN. RETURNED TO VENDOR.
- [SDR AUS20020628](https://openairdocs.org/sdr/AUS20020628.md): Stud · failed · Apr 21, 2002 · Bell 47G3B
  > (AUS) COOLING FAN MOUNT STUD LOCATED ON CRANKCASE FAILED. LOSS OF TENSION ALLOWED BELT TO FALL OFF AND DESTROY THE COOLING FAN.
- [SDR HEEA078225](https://openairdocs.org/sdr/HEEA078225.md): Motor · seized · Feb 28, 2002 · N855PH · Snias AS350B
  > COOLER BLOWER MOTOR HAS IT`S BEARINGS FROZEN.
- [SDR HEEA077870](https://openairdocs.org/sdr/HEEA077870.md): Bearing · rough · Feb 19, 2002 · N493PH · Bell 407
  > FWD BEARING ROUGH AND MAKING NOISE.
- [SDR HEEA077620](https://openairdocs.org/sdr/HEEA077620.md): Housing · damaged · Dec 19, 2001 · N493PH · Bell 407
  > COOLER BLOWER HOUSING HAS WORKING RIVETS.
- [SDR HEEA077584](https://openairdocs.org/sdr/HEEA077584.md): Duct · cracked · Dec 18, 2001 · N496PH · Bell 407
  > OIL COOLER DUCT CRACKED.
- [SDR HEEA077204](https://openairdocs.org/sdr/HEEA077204.md): Blower · failed · Nov 6, 2001 · N496PH · Bell 407
  > FORWARD BEARING LOUD AND ROUGH.
- [SDR HEEA076051](https://openairdocs.org/sdr/HEEA076051.md): Blower · failed · Sep 24, 2001 · N8045T · Bell 214ST
  > THE #1 PARTICLE SEPARATOR CAUTION LIGHT CAME ON. MAINTENANCE FOUND PARTICLE SEPARATOR BLOWER SHAFT SHEARED.
- [SDR AUS20010764](https://openairdocs.org/sdr/AUS20010764.md): Fan Blade · failed · Jul 18, 2001 · Bell 412
  > (AUS) NO1 ENGINE OIL COOLER BLOWER FAN BLADES SEPARATED FROM HUB.
- [SDR HEEA073787](https://openairdocs.org/sdr/HEEA073787.md): Oil Cooler · corroded · Jun 19, 2001 · N40466 · Snias AS350B2
  > OIL COOLER CORRODED. REPLACED WITH SERVICEABLE TRANS OIL COOLER.
- [SDR HEEA073643](https://openairdocs.org/sdr/HEEA073643.md): Blower · failed · Jun 19, 2001 · N3897N · Bell 214ST
  > SHAFT SHEARED. SENDING TO VENDOR FOR REPAIR.
- [SDR HEED073552](https://openairdocs.org/sdr/HEED073552.md): Shaft · vibration · Jun 14, 2001 · N3193E · Bell 407
  > HIGH RDA VIBRATION LEVEL. REPLACED UNIT.

Next page: https://openairdocs.org/jasc/6322/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 = '6322'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/6322/reports

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