# NTSB ANC88FA062: De Havilland DHC-2, N1435Z, Anchorage, AK, May 21, 1988

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 20, 1988, 21:21 local (May 21, 1988, 05:21 UTC)
- Place: Anchorage, AK
- Coordinates: 61.18914, -149.940658 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1891&lon=-149.9407&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report October 3, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4954
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88FA062
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4954/pdf
- Page: https://openairdocs.org/ntsb/ANC88FA062

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - flt control syst,aileron control - incorrect (cause)
  - maintenance,major repair - improper, other maintenance personnel (cause)
  - aircraft preflight - inadequate, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE AIRPLANE HAD UNDERGONE EXTENSIVE MAINTENANCE WHICH INCLUDED WORK ON THE CONTROL COLUMN. THE UPPER HALF OF THE CONTROL COLUMN WAS REPLACED WITH A THROW-OVER YOKE AND THE AILERON SYSTEM WAS RERIGGED. THE PILOT-IN-COMMAND PICKED UP THE AIRPLANE AFTER IT WAS TIED DOWN OUTSIDE FOR THREE MONTHS. ACCORDING TO A WITNESS, THE AIRPLANE LIFTED OFF THE WATER AND STARTED A LEFT BANK WHICH INCREASED UNTIL THE AIRPLANE STRUCK THE GROUND. POST ACCIDENT EXAMINATION REVEALED THE CONTROL CABLES AT THE BASE OF THE CONTROL COLUMN OPERATED IN REVERSE OF THE DESCRIPTION IN THE MAINTENANCE MANUAL. COMPLETE CONTROL CONTINUITY COULD NOT BE CONCLUDED BECAUSE OF THE EXTENSIVE POST IMPACT FIRE WHICH DESTROYED THE OVERHEAD BELLCRANK, PULLEY, AND INTERCONNECT SYSTEM.

## Aircraft

- Registration: [N1435Z](https://openairdocs.org/deregistered/N1435Z-2012-10-11), registration cancelled 2012-10-11, S/N 1252, built 1957 (OpenAirDocs)
- Reported make and model: DE HAVILLAND DHC-2
- Registry model: [Dehavilland BEAVER DHC-2](https://openairdocs.org/model/dehavilland-beaver-dhc-2) (registry code 2800108) (OpenAirDocs)
- Category: Airplane
- Serial number: 1252
- Airframe hours: 12737
- Engines: P&W R-985-39 450 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: Martin L. Slisco
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 19, 1988
- Departed: LHD, ANCHORAGE, AK
- Airport: LHD, Lake Hood Seaplane, runway 27, 4,540 × 188 ft, water

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial; airplane ratings: single-engine sea, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 3,000 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 6 knots
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 48 °F, dew point 34 °F
- Altimeter: 30.00 inHg
- Observed at: ANC, 5 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).

- [Accident 19880520015489A](https://openairdocs.org/incident/19880520015489A), May 20, 1988: Dhav DHC2*, Anchorage, AK, Destroyed, 1 fatal. Aircraft made left vertical bank on initial climb impacted and burned. Aileron control just reworked, were backward

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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