19980919034799A

Accident · Destroyed

FAA accident report · Piper PA-22-150 · Thornton, CO · September 19, 1998

Date: September 19, 1998
Place: Thornton, CO
Phase of flight: Fcd/Prec Ldg From Cruise
Operating rules: General operating rules (Part 91)
Damage: Destroyed
Aircraft: N6028D
NTSB investigation: NTSBFTW98FA392
Reported as: Piper PA22150
Fatal injuries: 0

N6028DRegistration cancelled Oct 29, 2014 · Piper PA-22-150S/N 22-4681 · Built 1956 Airframe modelPiper PA-22-150 Engine modelLycoming 0-320 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

Aircraft was destroyed during emergency landing which followed a power failure. Pilot sustained serious injuries. Pilot reported that engine was secured following loud bang with very strong vibrations. Investigation at accident scene by NTSB investigator Mr. Norman wiemeyer, was unable to locate 18 inch piece of one propeller blade. Aircraft engine was analyzed by Lycoming, FAA, NTSB during "tear down" procedures and was found to be operational. Analysis of propeller revealed section missing. Blade damage was not a result of impact damage. All investigators agree that stress fracture apparently caused portion of propeller to depart causing result in power loss and subsequent crash during emergency landing.

As the FAA filed it

AIRCRAFT WAS DESTROYED DURING EMERGENCY LANDING WHICH FOLLOWED A POWER FAILURE. PILOT SUSTAINED SERIOUS INJURIES. PILOT REPORTED THAT ENGINE WAS SECURED FOLLOWING LOUD BANG WITH VERY STRONG VIBRATIONS. INVESTIGATION AT ACCIDENT SCENE BY NTSB INVESTIGATOR MR. NORMAN WIEMEYER, WAS UNABLE TO LOCATE 18 INCH PIECE OF ONE PROPELLER BLADE. AIRCRAFT ENGINE WAS ANALYZED BY LYCOMING, FAA, NTSB DURING "TEAR DOWN" PROCEDURES AND WAS FOUND TO BE OPERATIONAL. ANALYSIS OF PROPELLER REVEALED SECTION MISSING. BLADE DAMAGE WAS NOT A RESULT OF IMPACT DAMAGE. ALL INVESTIGATORS AGREE THAT STRESS FRACTURE APPARENTLY CAUSED PORTION OF PROPELLER TO DEPART CAUSING RESULT IN POWER LOSS AND SUBSEQUENT CRASH DURING EMERGENCY LANDING.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB FTW98FA392Accident · Serious injuriesField investigationFinal reportThornton, COThe separation of a propeller blade due to corrosion initiated fatigue, followed by the separation of several of the engine's mounts, and the subsequent inability of the pilot to control the aircraft. A contributing factor was the trees.Sep 19, 1998 · Destroyed