ASN Wikibase Occurrence # 368268
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Friday 4 August 1989 |
| Time: | 13:40 LT |
| Type: |  Piper PA-23-180 |
| Owner/operator: | Private |
| Registration: | N4376P |
| MSN: | 23-1881 |
| Engine model: | LYCOMING O-360-A1D |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lancaster, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | (KWJF) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AFTER COMPLETION OF AN ANNUAL INSPECTION, THE AIRCRAFT OWNER ELECTED TO CONDUCT A MAINTENANCE TEST FLIGHT. WHILE AIRBORNE, HE SHUT DOWN THE RIGHT ENGINE, THEN FEATHERED AND UNFEATHERED THE PROPELLER, AND RESTARTED THE ENGINE BY LETTING THE PROPELLER WINDMILL. WHEN HE FOLLOWED THE SAME PROCEDURE WITH THE LEFT ENGINE AND PROPELLER, THE PROPELLER FAILED TO UNFEATHER AND HE COULD NOT RESTART THE ENGINE. THE PILOT RETURNED TO THE AIRPORT WITH ONE ENGINE OPERATING AND ATTEMPTED TO EXTEND THE LANDING GEAR DURING PATTERN ENTRY. THE LANDING GEAR DID NOT EXTEND AND THE PILOT INITIATED A GO-AROUND. THE AIRCRAFT DID NOT CLIMB AND BEGAN TO LOOSE ALTITUDE. EVENTUALLY, IT COLLIDED WITH THE GROUND OFF AIRPORT DURING AN UNARRESTED DESCENT. THE LANDING GEAR EXTENSION AND RETRACTION SYSTEM WAS HYDRAULIC AND POWERED BY A PUMP ON THE LEFT ENGINE. THE FLIGHT MANUAL PROVIDED TWO ALTERNATE MEANS OF EMERGENCY GEAR EXTENSION, NEITHER OF WHICH THE PILOT ATTEMPTED ON THE FIRST LANDING APPROACH.
Probable Cause: THE PILOT'S FAILURE TO FOLLOW ESTABLISHED PROCEDURES IN RESTARTING THE ENGINE THAT DRIVES THE HYDRUALIC PUMP AND HIS FAILURE TO FOLLOW PUBLISHED EMERGENCY LANDING GEAR EXTENSION PROCEDURES. THE PILOT'S DECISION TO SHUT DOWN AN ENGINE AND FEATHER THE PROPELLER BEFORE ASSURING HIMSELF THAT THE PROPELLER WOULD UNFEATHER AND HIS INADEQUATE TRAINING IN EMERGENCY PROCEDURES WERE FACTORS IN THE ACCIDENT.
Accident investigation:
 |
|
Sources:
NTSB LAX89LA263
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Mar-2024 16:30 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation