# Service difficulty reports: N639MM

A list on [N639MM](https://openairdocs.org/aircraft/N639MM.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR AC2A2023062213901](https://openairdocs.org/sdr/AC2A2023062213901.md): Actuator · unserviceable · Jun 18, 2023 · N639MM · Agusta AW139 · Main Rotor Gearbox
  > ROTOR BRAKE FAIL CAS ILLUMINATED ON SHUT DOWN WITH CALIPER INDICATING DOWN POSITION. REPLACED ROTOR BRAKE ACTUATOR.
- [SDR AC2A2022103013901](https://openairdocs.org/sdr/AC2A2022103013901.md): Tail Boom · unserviceable · Oct 30, 2022 · N639MM · Agusta AW139 · Rotorcraft Tail Boom
  > TAIL STRUCTURE HAS AREA OF DELAMINATION ON R/H SIDE.
- [SDR AC2A2022031713901](https://openairdocs.org/sdr/AC2A2022031713901.md): Plate · corroded · Mar 17, 2022 · N639MM · Agusta AW139 · Fuselage Structure (General)
  > CORROSION DAMAGE CAUSING REPLACEMENT OF AFT RIGHT UPPER PLATE.
- [SDR AC2A2022010913901](https://openairdocs.org/sdr/AC2A2022010913901.md): Bleed Valve · cracked · Jan 8, 2022 · N639MM · Agusta AW139 · Compressor Bleed Control
  > DURING TROUBLESHOOTING OF LOW POWER ON #1 ENGINE, #2 ENGINE BLEED VALVE WAS REMOVED TO SWAP WITH #1 ENGINE BLEED VALVE AND FOUND #2 BLEED VALVE SEALING DISC WAS CRACKED. BLEED VALVE WAS REPLACED.
- [SDR AC2A2021082313901](https://openairdocs.org/sdr/AC2A2021082313901.md): Actuator · faulted · Aug 21, 2021 · N639MM · Agusta AW139 · Flight Control System
  > 1 R AP FAIL CAS LIGHT ILLUMINATED DURING CHECK. REPLACED NO 1 ROLL ACTUATOR AND PERFORMED FUNCTIONAL CHECK.
- [SDR AC2A2021081813901](https://openairdocs.org/sdr/AC2A2021081813901.md): Chip Detector · damaged · Aug 9, 2021 · N639MM · Agusta AW139 · Main Rotor Gearbox
  > MGB L/H SUMP CHIP DETECTOR RETAINING GROOVES WORN BEYOND ACCEPTABLE PUBLISHED MANUFACTURE LIMITS AS RECEIVED FROM OVERHAUL CONDITION.
- [SDR AC2A2020020713901](https://openairdocs.org/sdr/AC2A2020020713901.md): Chip Detector · unbonded · Feb 7, 2020 · N639MM · Agusta AW139 · Tail Rotor Gearbox
  > THE INTERMEDIATE GEARBOX (IGB) CHIP DETECTOR HAS ROTATIONAL MOVEMENT AT THE PIN FOLLOWER RETAINING RING COLLAR.
- [SDR AC2A2020050113919](https://openairdocs.org/sdr/AC2A2020050113919.md): Filter · cracked · Jan 31, 2020 · N639MM · Agusta AW139 · Powerplant System
  > IBF MAINTENANCE INDICATOR FOUND CRACKED. *SUPPLEMENTAL INFORMATION* PART NUMBER ENTERED ON ORIGINAL SDR IN SECTION 5 WAS IN ERROR. PART NUMBER WAS SUBMITTED AS 104440-201 AND SHOULD HAVE BEEN 104441-201. *SUPPLEMENTAL INFORMATION* THE UNIQUE CONTROL CODE WAS A
- [SDR AC2R2018112901](https://openairdocs.org/sdr/AC2R2018112901.md): Handle · vibration · Nov 29, 2018 · N639MM · Agusta AW139 · Passenger/Crew Doors
  > COCKPIT DOOR OPENED IN FLIGHT. LANDED AT GC205 (NEAREST CHEVRON PLATFORM. AFTER LANDING, CREW INSPECTED AND SECURED DOOR. DETERMINED CAUSE OF DOOR OPENING WAS VIBRATION OF THE DOOR HANDLE.
- [SDR AC2A2020050113909](https://openairdocs.org/sdr/AC2A2020050113909.md): Filter · cracked · Nov 6, 2018 · N639MM · Agusta AW139 · Engine Air Intake System
  > IBF MAINTENANCE AID FOUND TO BE CRACKED.
- [SDR AC2A2020050113908](https://openairdocs.org/sdr/AC2A2020050113908.md): Filter · cracked · Oct 18, 2018 · N639MM · Agusta AW139 · Engine Air Intake System
  > IBF MAINTENANCE AID FOUND TO BE CRACKED.
- [SDR AC2R2018040201](https://openairdocs.org/sdr/AC2R2018040201.md): Fan · overheated · Mar 30, 2018 · N639MM · Agusta AW139 · Air Distribution Fan
  > PRIOR TO CRUISE CLEARANCE, PILOTS NOTICED A STRONG ELECTRICAL OVERHEAT ODOR WITH A SIMULTANEOUS FWD FAN CAS MESSAGE. NO SMOKE OR FLAMES WERE NOTED. CREW COMPLIED WITH QRH. REPLACED THE PILOT'S COCKPIT FAN.
- [SDR AC2R2017073102](https://openairdocs.org/sdr/AC2R2017073102.md): Blade · cracked · Jul 31, 2017 · N639MM · Agusta AW139 · Tail Rotor Blades
  > TAIL ROTOR BLADE CRACK AT INBOARD ROOT NEAR EROSION SHIELD.
- [SDR AC2R2017073101](https://openairdocs.org/sdr/AC2R2017073101.md): Blade · cracked · Jul 31, 2017 · N639MM · Agusta AW139 · Tail Rotor Blades
  > TAIL ROTOR BLADE CRACK AT INBOARD ROOT NEAR EROSION SHIELD.
- [SDR AC2R2018042004](https://openairdocs.org/sdr/AC2R2018042004.md): Oil Cooler · vibration · Oct 31, 2015 · N639MM · Agusta AW139 · Main Rotor Gearbox
  > OIL COOLER FAN HIGH VIBRATION READINGS.
- [SDR AC2A201309170001](https://openairdocs.org/sdr/AC2A201309170001.md): Torque Sensor · damaged · Sep 16, 2013 · N639MM · Agusta AW139 · Engine BMEP/Torque Indicating
  > ENGINE TORQUE MISCOMPARE CAS MESSAGE ILLUMINATED DURING GROUND RUN. FOUND TORQUE SENSORS DAMAGED FROM CONTACT WITH ROTATING COMPONENT.

## 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 n_number = 'N639MM' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N639MM/reports

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