Airplane Propeller Problems

The following information is derived from the FAA's Service Difficulty Reports and Aviation Maintenance Alerts.


Cessna 152

Cracked Propeller Hub

Propeller submitted for inspection and compliance with AD 10-04-05. Propeller (p/n 1A103TCM) was cracked along leading edge bolt holes beyond repair limits.

Part total time: Unknown

Cessna 152

Incorrectly Pitched Propeller

This prop (p/n 72CKS6056) was purchased new and installed. It has been overspeeding by 25-50 rpm. Sent it to be re-pitched and that corrected the issue. Records indicate that it should be an appropriate prop for this engine/aircraft.

Part total time: 398.0 hours

Cessna 208B Grand Caravan

Out-Of-Balance Propeller

During cruise flight, the aircraft experienced a vibration considered excessive. Pilot reduced propeller speed to 1800 rpm, which cleared the vibration for a short time. As the flight continued, the vibration returned. Pilot declared an emergency; destination airport was closest and flight landed without incident. External visual inspections of engine, propeller and engine accessories found no defects. Propeller was dynamically balanced with 28.4 grams of weight used. A test flight noted no vibration.

Part total time: 8244.0 hours

Cessna 402C Businessliner

Uncommanded Feather

Pilot reported that the right propeller (p/n 3AF32C93) went into uncommanded feather on takeoff roll. Engine was inspected with no defects noted. As a precaution, right prop governor was removed and replaced. Ops check okay.

Part total time: Unknown

Diamond DA42 Twinstar

Unfeather Failure

During a routine Part 61 training flight, the right engine was intentionally shut down to demonstrate inflight restarts. After a normal shutdown and securing procedure, the engine master switch was switched back to “ON” IAW the checklist. Usually, this would drive the propeller (p/n MTV6A) out of feather, and the restart procedure could be continued. The CFI noticed the propeller did not unfeather, and several procedures were attempted. They returned to the departure airport on the other engine.

Part total time: Unknown


Diamond DA42 TwinStar

Massive Oil Leak

At 697 hours since overhaul, oil began pouring out of the vent hole on the face of the hub. The propeller (p/n MTV12BCF) was sent in for disassembly and repair.

Part total time: 2146 hours


Piper PA-44-180 Seminole

Prop Feathers At Shutdown

Pilot reported that the right propeller was feathered during preflight. When the engine was shut down after a ground run, the propeller would start to feather within 30 seconds and continue until it was fully feathered. The prop was replaced with an overhauled unit.

Part total time 2043.0 hours


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