# NTSB ANC87IA003: Boeing 727-22C, N753AS, Anchorage, AK, October 15, 1986

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 15, 1986, 13:35 local (21:35 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159011, -149.989807 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1590&lon=-149.9898&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 115 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4792
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87IA003
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4792/pdf
- Page: https://openairdocs.org/ntsb/ANC87IA003

## Sequence of events

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

- Gear not extended, landing - roll
  - landing gear,nose gear assembly - disabled
  - maintenance,major repair - improper, other maintenance personnel (cause)

## Analysis

AFTER DEPARTURE, THE FLIGHT CREW RETRACTED THE LANDING GEAR AND NOTICED A NOSE GEAR DISAGREEMENT LIGHT. UPON ARRIVING AT ANCHORAGE, THE FLIGHT CREW COULD NOT LOWER THE NOSE GEAR THROUGH NORMAL OR MANUAL MEANS. THE AIRPLANE LANDED WITH MAIN GEAR EXTENDED AND THE NOSE GEAR RETRACTED. EXAMINATION OF THE NOSE GEAR MECHANISMS REVEALED THAT THE TWO LINKS WHICH EXERCISE THE PAWL BLOCK LOCKS HAD FAILED ALLOWING THE NOSE GEAR TO REMAIN IN THE FULLY RETRACTED AND LOCKED POSITION.

## Aircraft

- Registration: [N753AS](https://openairdocs.org/deregistered/N753AS-2013-04-01), registration cancelled 2013-04-01, S/N 19203, built 1967 (OpenAirDocs)
- Reported make and model: BOEING 727-22C
- Registry model: [Boeing 727-22C](https://openairdocs.org/model/boeing-727-22c) (registry code 138400F) (OpenAirDocs)
- Registry engine: [Pratt & Whitney JT8D-9 series](https://openairdocs.org/engine/pratt-whitney-jt8d-9-series) (registry code 52048, turbo-jet) (OpenAirDocs)
- Category: Airplane
- Serial number: 19203
- Airframe hours: 45697
- Engines: P&W JT8-D-7 14000 lbs thrust turbo jet
- Damage: Minor damage
- Flight: Business, Part 91
- Operator: Arco Aviation
- Registered owner: Alaska Airlines
- Airworthiness certificate: Standard, Transport
- Departed: KUPARAK, AK
- Destination: ANC, ANCHORAGE, AK
- Flight plan: IFR
- Airport: ANC, Anchorage Int'L, runway 6L, 10,300 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; airline transport; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 9,000 total, 2,000 in this make and model, 120 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 5 knots
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 39 °F
- Altimeter: 29.00 inHg
- Observed at: ANC, 25 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 19861015063779I](https://openairdocs.org/incident/19861015063779I), Oct 15, 1986: Boeing 72722C, Anchorage, AK, Minor damage. Unable to extend nose gear for landing. Found broken links in nose gear lock acutating arm to pawl block.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.