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NTSB Report
July 29, 1990 · De Havilland DHC-7-102 · N175RA
New York, NY
Overview
Report Status
Probable Cause
Event Type
Incident
Date
July 29, 1990
Injury Outcomes
No injuries (45 uninjured)
Location
New York, NY
Aircraft
De Havilland DHC-7-102
Tail Number
N175RA
Operator
Pan Am Express
Injuries
None
Aircraft Damage
Minor
NTSB Number
NYC90IA178
THE FLIGHT CREW WAS UNABLE TO GET A DOWN AND LOCKED INDICATION OF THE NOSE GEAR AFTER SEVERAL ATTEMPTS OF BOTH NORMAL AND EMERGENCY EXTENSION. IN ADDITION, THE NOSE GEAR VIEW WINDOW WAS DIRTY, AND THE CREW WAS UNABLE TO DETERMINE IF THE NOSE GEAR WAS DOWN, AND THEY RECEIVED CONFLICTING GROUND REPORTS ABOUT WHETHER 0R NOT IT WAS DOWN. DURING LANDING, THE NOSE GEAR COLLAPSED. POST INCIDENT INVESTIGATION DISCLOSED A BOGUS PART INSTALLED IN THE NOSE LANDING GEAR DOWN LOCK ACTUATOR WHICH JAMMED, PREVENTING FULL EXTENSION. THE NOSE LANDING GEAR VIEW WINDOW WAS NOT A MAINTENANCE INSPECTION ITEM. INTERVIEWS WITH THE FLT CREW DISCLOSED THEY ATTEMPTED AN EXTENSION FOR TOTAL HYDRAULIC FAILURE AND THEN RESET THE SELECTOR VALVE PRIOR TO TOUCHDOWN. WHEN THE VALVE WAS RESET, THE PRESSURE ON THE NOSE LANDING GEAR THAT WAS OBTAINED BY USING THE HAND PUMP WAS RELEASED.
NTSB Probable Cause
THE FLIGHT CREW'S FAILURE TO FOLLLOW THE LANDING GEAR EMERGENCY CHECKLIST. FACTORS WHICH CONTRIBUTED TO THE INCIDENT WERE: A JAMMED NOSE LANDING GEAR DUE TO THE INSTALLATION OF A BOGUS PART BY UNKNOWN PERSON(S) AND A DIRTY GEAR VIEWING WINDOW.
Full Narrative
THE FLIGHT CREW WAS UNABLE TO GET A DOWN AND LOCKED INDICATION OF THE NOSE GEAR AFTER SEVERAL ATTEMPTS OF BOTH NORMAL AND EMERGENCY EXTENSION. IN ADDITION, THE NOSE GEAR VIEW WINDOW WAS DIRTY, AND THE CREW WAS UNABLE TO DETERMINE IF THE NOSE GEAR WAS DOWN, AND THEY RECEIVED CONFLICTING GROUND REPORTS ABOUT WHETHER 0R NOT IT WAS DOWN. DURING LANDING, THE NOSE GEAR COLLAPSED. POST INCIDENT INVESTIGATION DISCLOSED A BOGUS PART INSTALLED IN THE NOSE LANDING GEAR DOWN LOCK ACTUATOR WHICH JAMMED, PREVENTING FULL EXTENSION. THE NOSE LANDING GEAR VIEW WINDOW WAS NOT A MAINTENANCE INSPECTION ITEM. INTERVIEWS WITH THE FLT CREW DISCLOSED THEY ATTEMPTED AN EXTENSION FOR TOTAL HYDRAULIC FAILURE AND THEN RESET THE SELECTOR VALVE PRIOR TO TOUCHDOWN. WHEN THE VALVE WAS RESET, THE PRESSURE ON THE NOSE LANDING GEAR THAT WAS OBTAINED BY USING THE HAND PUMP WAS RELEASED.
Flight
Event TypeIncident
Event Time17:57 EDT
Nearest AirportJohn F Kennedy (0nm N)
Runway13L
Runway Length10000 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDe Havilland DHC-7-102
Tail NumberN175RA
Aircraft CategoryAir
DamageMinor
OperatorPan Am Express
Operating RulePart 121
Engines4
Engine TypeTurboprop
Engine DetailsP&W · PT6-50 · Turboprop · 1120
Seats54
People & Injuries
Injury SummaryNo injuries (45 uninjured)
Fatal0
Serious0
Minor0
Uninjured45
Total45
Crew 1Age 25 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 8 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO