# NTSB MIA84IA140: Boeing 747-121, N751PA, Martinique, April 14, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: April 14, 1984, 18:50 local (23:50 UTC)
- Place: Martinique
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 263 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31036
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA84IA140
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31036/pdf
- Page: https://openairdocs.org/ntsb/MIA84IA140

## Sequence of events

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

- Airframe/component/system failure/malfunction, climb - to cruise
  - door,landing gear - fatigue (cause)
  - door,landing gear - separation

## Analysis

WHILE CLIMBING THROUGH FL200 CREW EXPERIENCED A LOSS OF #4 HYDRAULIC SYSTEM PRESSURE, ILLUMINATION OF THE RED 'GEAR DOOR' AND 'LEFT WING DOOR OPEN' LIGHTS, A MEDIUM FREQ VIBRATION AND HEARD A LOUD RUSHING SOUND. FLT DIVERTED TO MIAMI, FL, WHERE LANDING WAS MADE WITHOUT INCIDENT. INVESTIGATION DISCLOSED LEFT WING LANDING GEAR DOOR ACTUATOR, ACTUATOR BEAM ASS'Y AND ASSOC KEEL BEAM BOX ATTACHING HARDWARE WERE MISSING. BOEING SUBSEQUENTLY HAS ISSUED A SERVICE BULLETIN REGARDING DETECTION OF CRACKS IN THE INTERNAL BACK-UP BRACKETS & FITTINGS FOR THE WING GEAR DOOR ACTUATING SYSTEM.

## Aircraft

- Registration: N751PA (not matched to a registry record)
- Reported make and model: BOEING 747-121
- Category: Airplane
- Serial number: 19665
- Airframe hours: 56042
- Engines: P&W JT9D turbo fan
- Damage: Minor damage
- Flight: Part 121
- Operator: Pan American (Paaa)
- Registered owner: Bankers Trust Co. Trustee
- Airworthiness certificate: Standard, Transport
- Destination: JFK, NEW YORK, NY
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: unknown, valid medical--w/ waivers/lim; seat: left; flight hours: 26,000 total, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Not reported

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19840414027919I](https://openairdocs.org/incident/19840414027919I), Apr 14, 1984: Boeing 747121, Martinigue, MB, Minor damage. Left wing gear door separated from aircraft on climb. Lost hydraulic fluid on nr 4 hydraulics. Cause undetermined.

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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