# NTSB ANC87IA077: Boeing 727-90C, N766AS, Anchorage, AK, June 9, 1987

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Incident investigation · Final report
- Date: June 9, 1987, 08:55 local (16:55 UTC)
- Place: Anchorage, AK
- Coordinates: 61.160991, -149.990921 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1610&lon=-149.9909&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 11 minor; on the ground: 9 minor
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4797
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87IA077
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4797/pdf
- Page: https://openairdocs.org/ntsb/ANC87IA077

## Sequence of events

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

- On ground/water collision with object, taxi
  - object - airport facility
  - brakes(normal) - inadvertent deactivation, company maintenance personnel (cause)
  - planning/decision - inadequate, company maintenance personnel (contributing factor)
  - checklist - not used, company maintenance personnel (cause)
- Fire, other

## Analysis

THE MECHANIC IN CHARGE OF TAXIING THE BOEING 727 ALLOWED AN UNAUTHORIZED AVIONICS TECHNICIAN TO OCCUPY THE PILOT SEAT. THEY INADVERTENTLY DEACTIVATED THE BRAKE PRESSURIZATION SYSTEM AND STRUCK A PASSENGER JETWAY AT THE TERMINAL GATE. AN ENSUING FIRE DESTROYED THE AIRPLANE AND A COMPANY GROUND VEHICLE AND EXTENSIVELY DAMAGED THE JETWAY. THE TERMINAL GATE WAS ALSO DAMAGED. A TOTAL OF 11 PERSONS WERE INJURED.

## Aircraft

- Registration: [N766AS](https://openairdocs.org/deregistered/N766AS-1989-01-18), registration cancelled 1989-01-18, S/N 19728 (OpenAirDocs)
- Reported make and model: BOEING 727-90C
- Registry model: [Boeing 727-90C](https://openairdocs.org/model/boeing-727-90c) (registry code 1384030) (OpenAirDocs)
- Category: Airplane
- Serial number: 19728
- Airframe hours: 49937
- Engines: P&W JT8D-9A 14500 lbs thrust turbo fan
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 91
- Operator: Alaska Airlines
- Registered owner: Alaska Airlines
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, June 8, 1987
- Airport: ANC, Anchorage International

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; medical: unknown; seat: right

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 7 knots
- Visibility: 60 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 46 °F, dew point 37 °F
- Altimeter: 29.00 inHg
- Observed at: ANC, 4 nm away

## 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 19870609021199I](https://openairdocs.org/incident/19870609021199I), Jun 9, 1987: Boeing 72790C, Anchorage, AK, Destroyed. Mechanic taxied 727 to a gate with an unauthorized co-pilot and inadvertently deactivated brakes. Hit jetway. Burned.

## Other investigations on N766AS (1)

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.

- [NTSB SEA84IA033](https://openairdocs.org/ntsb/SEA84IA033), Jan 5, 1984: Boeing B-727-90C (N766AS), Seattle, WA, incident, minor damage

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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