# NTSB DEN87IA207: Airbus Industrie A-300-B4-203, N966C, Denver, CO, August 3, 1987

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: August 3, 1987, 12:40 local (18:40 UTC)
- Place: Denver, CO
- Coordinates: 39.760746, -104.920471 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.7607&lon=-104.9205&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 279 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 17140
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87IA207
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17140/pdf
- Page: https://openairdocs.org/ntsb/DEN87IA207

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - electrical system,constant speed drive unit - underspeed (cause)
  - maintenance,overhaul - not performed, company maintenance personnel (cause)
  - abort - delayed, pilot in command (cause)
- Overrun, takeoff - aborted
  - landing gear,anti-skid brake system - failure,partial (contributing factor)
  - abort above v1 - performed, pilot in command (cause)

## Analysis

AS COPLT ACCELERATED ACFT THROUGH 128 KTS FOR TAKEOFF, ELECTRICAL MALFUNCTION OCCURRED RESULTING IN UNRELIABLE INSTRUMENT INDICATIONS. CAPT REJECTED TAKEOFF. ACFT WENT OFF END OF 12000-FT RWY. POST-INCIDENT EXAMINATION DISCLOSED NO. 1 CONSTANT SPEED DRIVE (CSD) OUTPUT SLOWED DUE TO OIL LEAKAGE. GENERATOR CONTROL UNIT TRIPPED AND OPENED LINE CONTACTOR. WITH REMOVAL OF ELECTRICAL LOAD, CSD OUTPUT SPEED INCREASED & ELECTRICAL LOAD REAPPLIED. CYCLE REPEATED ITSELF EVERY 0.84 SECONDS. CSD HAD NEVER BEEN OVERHAULED IN 10 YRS OF SERVICE. CVR/DFDR REVEALED ELECTRICAL MALFUNCTION OCCURRED AT 1240:12 & ABORT COMMAND GIVEN AT 1240:29. AT 1240:26, WHEN PWR WAS RESTORED TO DFDR, ACFT WAS DECELERATING THRU 171.08 KIAS. V1,VR, & V2 COMPUTED TO BE 161, 161, AND 165 KTS & ACCELERATE-STOP DISTANCE ABOUT 11,500 FT. INVESTIGATION FURTHER REVEALED ACFT GREEN BRAKE SYSTEM INOP & YELLOW SYSTEM USED. ADDITIONALLY, NO. 7 BRAKE ANTISKID INOP. BOTH ARE ALLOWABLE DEFERRED MAINTENANCE ITEMS.

## Aircraft

- Registration: N966C (not matched to a registry record)
- Reported make and model: Airbus Industrie A-300-B4-203 (A300-B4-20)
- Category: Airplane
- Serial number: 0117
- Airframe hours: 11147
- Engines: GE CF6-50C2 38000 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Part 121
- Registered owner: Continental Airlines, Inc.
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, February 12, 1987, 1,686 hours before
- Departed: DEN
- Destination: SEA, SEATTLE, WA
- Flight plan: IFR
- Airport: DEN, Stapleton Int'L, runway 35R, 12,000 × 200 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial, airline transport; airplane ratings: multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 12,100 total, 661 in this make and model, 97 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 11 knots
- Visibility: 30 statute miles
- Lowest ceiling: 25,000 ft overcast
- Temperature: 77 °F, dew point 55 °F
- Altimeter: 30.00 inHg
- Observed at: DEN

## 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 19870803057929I](https://openairdocs.org/incident/19870803057929I), Aug 3, 1987: Airbus A300B4203, Denver, CO, Minor damage. A generator csd malfunctioned on takeoff. Pilot delayed abort. Aircraft ran off end of runway. Antiskid malfunction.

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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