ASN Wikibase Occurrence # 364501
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| Date: | Friday 20 September 1991 |
| Time: | 16:23 LT |
| Type: |  Piper PA-23-250 |
| Owner/operator: | Private |
| Registration: | N915PM |
| MSN: | 27-7305030 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 2594 hours |
| Engine model: | LYCOMING TIO-540 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Boscobel, WI -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
PURPOSE OF THE FLT WAS FOR THE PIC TO GET A MULTI-ENG (ADD-ON) RATING. DRG A 2 ENG GO-ARND, THE DESIGNATED PLT EXAMINER (DPE) SIMULATED AN ENG FAILURE BY RETARDING THE L THROTTLE. SOON THEREAFTER, THE AIRSPEED DECREASED & THE PIC ADZD THE DPE THAT HE WAS UNABLE TO MAINT ALT OR ATTITUDE. THE L THROTTLE WAS RE-ADVANCED WITH NO APPARENT EFFECT. THE PIC WAS UNABLE TO RESTORE PWR IN THE L ENG & RELINQUISHED THE FLT CTLS TO THE DPE. THE ACFT WAS PREPARED FOR AN APCH TO THE ARPT. WITH THE L ENG (& HYD SYS) INOP, THE PIC USED THE MANUAL HAND PUMP TO OPER THE GEAR & FLAPS (AFTER ASSURING THE ACFT WOULD CLR OBSTACLES). HE CONTD PUMPING, BUT THE ACFT WAS FORCED TO LND SHORT OF THE RWY & THE NOSE GEAR COLLAPSED DRG TCHDWN BFR IT WAS FULLY EXTDD. THE WING FLAPS WERE FND EXTDD. THE LNDG GEAR & WING FLAPS OPERD FM THE SAME HYD SYS; EITHER COULD HAVE BEEN ACTUATED INDEPENDENTLY OF THE OTR. THE HYD SYS WAS BUILT SO THAT WHEN THE GEAR & FLAPS WERE ENGAGED AT THE SAME TIME, THE GEAR WOULD COMPLETE ITS OPN BFR THE FLAPS OPERD. NO REASON FND FOR LOSS OF PWR IN L ENG.
Probable Cause: IMPROPER REMEDIAL ACTION BY THE PILOT-IN-COMMAND (PIC), AND INADEQUATE MONITORING BY THE DESIGNATED PILOT EXAMINER (DPE) DURING A SIMULATED EMERGENCY PROCEDURE. FACTORS RELATED TO THE ACCIDENT WERE: THE LOSS OF POWER IN ONE ENGINE DUE TO AN UNDETERMINED REASON, AND OBSTRUCTIONS IN THE EMERGENCY LANDING AREA THAT REQUIRED A DELAY OF GEAR EXTENSION IN ORDER TO REACH A CLEAR AREA.
Accident investigation:
 |
|
Sources:
NTSB CHI91LA299
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 15:45 | ASN Update Bot | Added |
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