NYC92LA011

NTSB accident investigation · Aerospatiale ND-26 · Albany, NY · October 20, 1991

Accident · No injuriesLimited investigationFinal report
Date
October 20, 1991, 01:15 local (06:15 UTC)
Place
Albany, NY
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N29816Aerospatiale ND-26
Weather
Visual (VMC) · Night/dark
Status
Completed · report April 27, 1993
Report
Approved by Office Director
FAA report
19911020047019A
Case key
37092

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

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Probable cause

Inadequate quality control during maintenance or manufacturing by failing to use corrosion inhibiter, which resulted in corrosion, fatigue, and subsequent failure.

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.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Propeller system/accessories,blade - corrodedCause
Propeller system/accessories,blade - fatigueCause
Inadequate quality controlCause

Analysis

A propeller blade failed during takeoff and entered the fuselage. The crew aborted the takeoff successfully. Metallurgical examination revealed that the blade failed as a result of 'multiple fatigue crack origins (which) had emanated from corrosion pits on the blade bore surface.' The blade bore was supposed to be coated with a chromate conversion to inhibit corrosion. Energy dispersive x-ray spectrograph (eds) revealed no evidence that the chromate conversion coating had been accomplished.

Aircraft

Registration
N29816
Reported as
Aerospatiale ND-26
Category
Airplane
Airframe hours
13,917
Engine
P&W PT6-45, 1,229 horsepower, turbo prop
Damage
Substantial damage
Flight
Ferry · Part 91
Operator
Richmor Aviation Inc
Registered owner
Richmor Aviation Inc
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · October 18, 1991 · 2 hours before
Destination
1B1 · Hudson, NY
Airport
ALB · Albany County, runway 1, 7,200 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
29
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
5,200 total · 1,000 in this make and model · 4,000 as pilot in command · 90 in the last 90 days · 30 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F

FAA reports on this event · 1

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