# Service difficulty reports: Pratt & Whitney R-1830-90D

A list on [Pratt & Whitney R-1830-90D](https://openairdocs.org/engine/pratt-whitney-r-1830-90d.md).

Newest first. General aviation reporting is voluntary.

- [SDR D7TA20211](https://openairdocs.org/sdr/D7TA20211.md): Cylinder · cracked · Oct 21, 2021 · N44587 · Doug DC3AS1C3G · Engine (Reciprocating)
  > ENGINE SHUT DOWN ON FLIGHT TO AKIAK - RIGHT ENGINE #6 CYLINDER CRACKED BETWEEN BARREL AND HEAD.
- [SDR D7TA201709140001](https://openairdocs.org/sdr/D7TA201709140001.md): Engine · failed · Sep 7, 2017 · N272R · Doug DC3C · Engine (Turbine/Turboprop)
  > ENGINE HAD HIGH TEMPERATURE AND LOW OIL PRESSURE.
- [SDR D7TA2012090800001](https://openairdocs.org/sdr/D7TA2012090800001.md): Cylinder · cracked · Aug 17, 2012 · N44587 · Doug DC3C · Reciprocating Engine Cylinder Section
  > NUMBER ONE CYLINDER FAILURE ON THE RIGHT ENGINE.
- [SDR 020204](https://openairdocs.org/sdr/020204.md): Engine · failed · Feb 2, 2004 · N36AP · Doug DC3C · Engine (Reciprocating)
  > IN CLIMB POWER IN ROUTE RT ENGINE BEGAN TO MISFIRE AND RUN ROUGH. OIL TEMP ALSO INCREASED. ENGINE WAS SHUTDOWN AND AIRCRAFT DIVERTED. ENGINE WAS FOUND VERY HARD TO PULL THROUGH AND METAL FOUND IN SCREEN. SUSPECT CAM RING FAILURE.
- [SDR 092703](https://openairdocs.org/sdr/092703.md): Engine · failed · Sep 29, 2003 · N932H · Doug DC3C · Engine (Reciprocating)
  > AT CRUISE POWER FOR 3 HOURS ENROUTE FROM LRD-GMU, RT ENGINE STARTED RUNNING ROUGH AND BLOWING OIL OUT OF THE CRANKCASE BREATHER. AIRCRAFT DIVERTED TO LFT. SUSPECT CYLINDER AND SCAVENGE PUMP FAILURE.
- [SDR 092503](https://openairdocs.org/sdr/092503.md): Rod Bearing · failed · Sep 25, 2003 · N36AP · Doug DC3C · Reciprocating Engine Power Section
  > AT CLIMB POWER 10 MINUTES OUT OF GSO ENROUTE TO BIV RT ENGINE OIL TEMP. WENT TO 100 C, OIL PRESSURE DROPPED TO 40 PSI. AIRCRAFT RETURNED TO GSO. SUSPECTED MASTER ROD BEARING FAILURE. METAL FOUND IN OIL SCREEN AND OIL TANK.
- [SDR 82703](https://openairdocs.org/sdr/82703.md): Cylinder · separated · Aug 27, 2003 · N9923S · Doug DC3C · Reciprocating Engine Cylinder Section
  > AT CRUISE POWER FOR OVER 5 HOURS IN ROUTE MWO-LRD LEFT ENGINE STARTED RUNNING ROUGH. AIRCRAFT DIVERTED TO AUS. FOUND NR 1 CYLINDER HEAD SEPARATED FROM THE BARREL.
- [SDR 42403](https://openairdocs.org/sdr/42403.md): Cylinder Head · split · Apr 24, 2003 · N36AP · Doug DC3C · Reciprocating Engine Cylinder Section
  > AT CLIMB POWER IN ROUTE HZY-UDG RIGHT ENGINE DEVELOPED A VIBRATION AND A SLIGHT LOSS OF POWER. AIRCRAFT DIVERTED TO MWO. FOUND NR 1 CYLINDER HEAD SEPARATED FROM BARREL.
- [SDR 2002F00370](https://openairdocs.org/sdr/2002F00370.md): Cylinder · separated · Apr 5, 2002 · N9923S · Doug DC3C · Reciprocating Engine Cylinder Section
  > AT CRUISE POWER, LEFT ENGINE DEVELOPED A (SHAKE). ENGINE WAS SHUT DOWN AND AIRCRAFT DIVERTED. FOUND NR 4 CYLINDER LIFTED FROM ITS BASE. THE CYLINDER BARREL FAILURE ALSO CAUSED THE NR4 LINK ROD TO FAIL.
- [SDR AC92001F00000](https://openairdocs.org/sdr/AC92001F00000.md): Cylinder · cracked · Jun 26, 2001 · N9923S · Doug DC3C · Reciprocating Engine Cylinder Section
  > AT CRUISE POWER, LEFT ENGINE DEVELOPED A SLIGHT VIBRATION. AIRCRAFT WAS ENROUTE FROM DEPART TO ARRIVAL, DIVERTED. FOUND NR 14 CYLINDER, LEFT ENGINE CRACKED AT EXHAUST PORT.
- [SDR 20010208CW002](https://openairdocs.org/sdr/20010208CW002.md): Engine · leaking · Dec 8, 2000 · N932H · Doug DC3C · Reciprocating Engine Power Section
  > IN ROUTE FROM RYV TO RDV, RT ENGINE STARTED LEAKING OIL OUT OF THE CRANKCASE BREATHER. DIVERTED TO FWA. SUSPECT SCAVAGE PUMP NOT OPERATED CORRECTLY.
- [SDR 99ZZZX3680](https://openairdocs.org/sdr/99ZZZX3680.md): Bearing · failed · Aug 23, 1999 · N907Z · Doug DC3C · Reciprocating Engine Power Section
  > AT CRUISE POWER SETTING, LEFT ENGINE LOST POWER. AIRCRAFT DIVERTED TO VIN. FOUND METAL IN SCREEN AND REAR VALVES NOT MOVING. SUBMITTER SUSPECTED REAR MAIN BEARING FAILURE.
- [SDR 99ZZZX2189](https://openairdocs.org/sdr/99ZZZX2189.md): Engine · failed · May 2, 1999 · N9923S · Doug DC3C · Engine (Reciprocating)
  > AIRCRAFT EN ROUTE FROM MBS/TPA. LEFT ENGINE STARTED TO LOSE POWER AND WOULD NOT MAINTAIN MANIFOLD PRESSURE. AIRCRAFT DIVERTED TO MWO. FOUND REAR CYLINDERS VALVES NOT MOVING. SUBMITTER SUSPECTED REAR CAM RING FAILURE.
- [SDR 98ZZZX4501](https://openairdocs.org/sdr/98ZZZX4501.md): Cylinder · failed · Nov 11, 1998 · N36AP · Doug DC3C · Reciprocating Engine Cylinder Section
  > AFTER TAKEOFF ON CLIMB, LEFT ENGINE STARTED TO SHAKE. FOUND NR 14 CYLINDER WITH BROKEN EXHAUST VALVE.
- [SDR 98ZZZX956](https://openairdocs.org/sdr/98ZZZX956.md): Magneto · failed · Jan 19, 1998 · N36AP · Doug DC3C · Magneto/Distributor
  > IN CRUISE POWER, PILOT REPORTED RIGHT ENGINE SHAKING. WHEN ON GROUND, MAGNETO CHECK SHOWED LEFT MAGNETO RUNNING VERY ROUGH. REMOVED MAGNETO AND FOUND IT SPARKING INTERMITTENTLY.
- [SDR 97ZZZX3343](https://openairdocs.org/sdr/97ZZZX3343.md): Intake Valve · failed · Jun 26, 1997 · N59314 · Doug DC3C · Reciprocating Engine Cylinder Section
  > INTAKE VALVE ON NR 5M CYLINDER CAME APART AND PUNCHED A HOLE IN FRONT TOP OF CYLINDER WALL AND HEAD.
- [SDR 97ZZZX2680](https://openairdocs.org/sdr/97ZZZX2680.md): Lead · shorted · May 16, 1997 · N683LS · Doug DC3C · Ignition Harness (Distribution)
  > AIRCRAFT WAS EN ROUTE CLIMBING THROUGH 7,000 FEET IN VISABLE PRECIPITATION WHEN LEFT ENGINE STARTED RUNNING ROUGH. AIRCRAFT DIVERTED TO FORT WAYNE, INDIANA. MX FOUND WATER HAD SHORTED OUT HIGH TENSION LEAD CAUSING MISFIRING. REPLACED LEAD. AIRCRAFT RETURNE
- [SDR 97ZZZX834](https://openairdocs.org/sdr/97ZZZX834.md): Carburetor · malfunction · Jan 18, 1997 · N8187E · Doug DC3C · Fuel Control/Reciprocating Engines
  > AFTER LANDING, LT ENGINE WOULD NOT IDLE FOR TAXI. OUTSIDE, AIR TEMP WAS AROUND ZERO DEGREES FAHRENHEIT. SUBMITTER STATED IT IS POSSIBLE SOMETHING INTERNALLY IN THE CARBURETOR FROZE UP CAUSING THE MALFUNCTION.
- [SDR 96ZZZX3797](https://openairdocs.org/sdr/96ZZZX3797.md): Carburetor · malfunction · Jul 19, 1996 · N32MS · Doug DC3 · Fuel Control/Reciprocating Engines
  > ENGINE WILL NOT IDLE, DIES/RESTARTS OK. WILL NOT TAKE THROTTLE. WANTS TO BACKFIRE THROUGH CARBURETOR. REMOVED CARBURETOR. REPLACED WITH OVERHAULED UNIT.
- [SDR 96ZZZX1086](https://openairdocs.org/sdr/96ZZZX1086.md): Pushrod · broken · Feb 2, 1996 · N9923S · Doug DC3C · Reciprocating Engine Cylinder Section
  > ENGINE STARTED RUNNING ROUGH. FOUND NR 6 CYLINDER EXHAUST PUSHROD BROKEN IN TWO. THIS CAUSED EXHAUST VALVE IN NR 6 CYLINDER NOT TO OPEN.
- [SDR 95ZZZX7013](https://openairdocs.org/sdr/95ZZZX7013.md): Cylinder · head separated · Dec 7, 1995 · N9923S · Doug DC3C · Reciprocating Engine Cylinder Section
  > DURING APPROACH, LEFT ENGINE STARTED RUNNING ROUGH. INSPECTION FOUND NR 11 CYLINDER HEAD HAD SEPARATED FROM BARREL.
- [SDR 95ZZZX3312](https://openairdocs.org/sdr/95ZZZX3312.md): Engine · making metal · Jun 14, 1995 · N32MS · Doug DC3A · Engine (Reciprocating)
  > OIL TEMP HIGHER THAN NORMAL ON TRAINING FLIGHT. FOUND SMALL AMOUNT OF METAL IN OIL SCREEN. ENGINE REMOVED FOR REPAIR 6-13-95.
- [SDR 95ZZZX1684](https://openairdocs.org/sdr/95ZZZX1684.md): Valve · failed · Feb 17, 1995 · N12BA · Doug DC3A · Reciprocating Engine Cylinder Section
  > EXHAUST VALVE IN THE NR 9 CYLINDER NR 2 ENGINE FAILED CAUSING ENGINE TO RUN ROUGH. FURTHER INVESTIGATION FOUND METAL CONTAMINATION IN THE OIL SUMPS. THESE METAL FRAGMENTS WERE DETERMINED TO BE FROM PIECES OF THE DAMAGED VALVE. IT WAS THEN DECIDED TO REMOVE

## 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 = 'R183090D'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/pratt-whitney-r-1830-90d/reports

---
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.