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NTSB Report
September 20, 1991 · Piper PA-23-250 · N915PM
Boscobel, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 20, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Boscobel, WI
Aircraft
Piper PA-23-250
Tail Number
N915PM
Operator
Thomas G Pelz
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI91LA299
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.
NTSB 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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time16:23 CDT
Nearest AirportBOSCOBEL (0nm)
Runway1
Runway Length3710 ft
Runway Width58 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-23-250
Tail NumberN915PM
Aircraft CategoryAir
DamageSubstantial
OperatorThomas G Pelz
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · TIO-540 · Reciprocating · 250
Seats6
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 49 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind270°
Visibility15 sm
CeilingNone
Temperature / Dew Point54 / 0 C
Altimeter0
Weather SourcePILO