# NTSB NYC92LA011: Aerospatiale ND-26, N29816, Albany, NY, October 20, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 20, 1991, 01:15 local (06:15 UTC)
- Place: Albany, NY
- Coordinates: 42.700397, -73.760047 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.7004&lon=-73.7600&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report April 27, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 37092
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC92LA011
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/37092/pdf
- Page: https://openairdocs.org/ntsb/NYC92LA011

## 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

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - propeller system/accessories,blade - corroded (cause)
  - propeller system/accessories,blade - fatigue (cause)
  - inadequate quality control (cause)

## 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 (not matched to a registry record)
- Reported make and model: AEROSPATIALE ND-26
- Category: Airplane
- Airframe hours: 13917
- Engines: P&W PT6-45 1229 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.

- Pilot; age 29; 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 (OpenAirDocs).

- [Accident 19911020047019A](https://openairdocs.org/incident/19911020047019A), Oct 20, 1991: Aerosp 262ANORD, Albany, NY, Substantial damage. Left engine prop blade separated on liftoff and penetrated baggage compartment. Aborted landed safely on runway.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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