NYC90IA178

NTSB incident investigation · De Havilland DHC-7-102 · New York, NY · July 29, 1990

Incident · No injuriesIncident investigationFinal report
Date
July 29, 1990, 17:57 local (21:57 UTC)
Place
New York, NY
Injuries
45 uninjured
Damage
Minor damage
Phase of flight
Approach
Aircraft
N175RADe Havilland DHC-7-102
Weather
Visual (VMC) · Day
Status
Completed · report May 10, 1993
Report
Approved by Office Director
FAA report
19900729038299I
Case key
36557

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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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.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Gear not extendedApproach
Landing gear,normal retraction/extension assembly - unapproved partFactor
Maintenance,replacement - improperOther maintenance personnelFactor
Landing gear,normal retraction/extension assembly - jammedFactor
Window,inspection/observation - dirty(foggy)Factor
Maintenance,inspection - inadequateCompany maintenance personnelFactor
Emergency procedure - improperPilot in commandCause

Analysis

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.

Aircraft

Registration
N175RA
Reported as
De Havilland DHC-7-102
Category
Airplane
Serial number
56
Engine
P&W PT6-50, 1,120 horsepower, turbo prop
Damage
Minor damage
Flight
Part 121
Operator
Pan Am Express, Inc.
Registered owner
Unknown
Departed
BOS · Boston, MA
Flight plan
IFR
Airport
JFK · John F Kennedy, runway 13L, 10,000 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
25
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
3,298 total · 945 in this make and model · 1,717 as pilot in command · 123 in the last 90 days · 50 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 8 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.