Kenai - Anchorage

The pilot had just departed the runway when he reported to the flight service station that he had engine problems. The aircraft was observed by witnesses to be about 300 feet on a descending downwind. The pilot stated that he was circling for runway 01. Surviving passengers described the engines as running rough and uneven. The investigation revealed that the aircraft's weight was more than the pilot had calculated and the CofG was 3.4 inches further aft than was calculated. However, the weight and CofG were within limits. Examination of the engine disclosed that the right engine had an extensive cylinder head crack, a partially disconnected intake pipe, and was capable of producing 55% of rated power. The left engine had seven severely worn cam lobes. The rudder trim was deflected full left at impact. The evidence indicated that the pilot had retarded the throttle for the left engine and was using only the right engine to sustain flight. Exam of company checklist usage revealed several different improper versions. The pilot and five passengers were killed. Two others passengers and two people on the ground were injured.

Flight / Schedule

Kenai - Anchorage

Registration

N496SC

MSN

31-7752077

Year of Manufacture

1977

Date

December 23, 1987 at 06:11 AM

Type

CRASH

Flight Type

Scheduled Revenue Flight

Flight Phase

Takeoff (climb)

Crash Site

Airport (less than 10 km from airport)

Crash Location

Kenai Alaska

Region

North America • United States of America

Coordinates

60.5544°, -151.2583°

Crash Cause

Human factor

Narrative Report

On December 23, 1987 at 06:11 AM, Kenai - Anchorage experienced a crash involving Piper PA-31-350 Navajo Chieftain, operated by SouthCentral Air, with the event recorded near Kenai Alaska.

The flight was categorized as scheduled revenue flight and the reported phase was takeoff (climb) at a airport (less than 10 km from airport) crash site.

8 people were known to be on board, 6 fatalities were recorded, 2 survivors were identified or estimated. This corresponds to an estimated fatality rate of 75.0%.

Crew on board: 1, crew fatalities: 1, passengers on board: 7, passenger fatalities: 5, other fatalities: 0.

The listed crash cause is human factor. The pilot had just departed the runway when he reported to the flight service station that he had engine problems. The aircraft was observed by witnesses to be about 300 feet on a descending downwind. The pilot stated that he was circling for runway 01. Surviving passengers described the engines as running rough and uneven. The investigation revealed that the aircraft's weight was more than the pilot had calculated and the CofG was 3.4 inches further aft than was calculated. However, the weight and CofG were within limits. Examination of the engine disclosed that the right engine had an extensive cylinder head crack, a partially disconnected intake pipe, and was capable of producing 55% of rated power. The left engine had seven severely worn cam lobes. The rudder trim was deflected full left at impact. The evidence indicated that the pilot had retarded the throttle for the left engine and was using only the right engine to sustain flight. Exam of company checklist usage revealed several different improper versions. The pilot and five passengers were killed. Two others passengers and two people on the ground were injured.

Aircraft reference details include registration N496SC, MSN 31-7752077, year of manufacture 1977.

Geospatial coordinates for this crash are approximately 60.5544°, -151.2583°.

Fatalities

Total

6

Crew

1

Passengers

5

Other

0

Crash Summary

The pilot had just departed the runway when he reported to the flight service station that he had engine problems. The aircraft was observed by witnesses to be about 300 feet on a descending downwind. The pilot stated that he was circling for runway 01. Surviving passengers described the engines as running rough and uneven. The investigation revealed that the aircraft's weight was more than the pilot had calculated and the CofG was 3.4 inches further aft than was calculated. However, the weight and CofG were within limits. Examination of the engine disclosed that the right engine had an extensive cylinder head crack, a partially disconnected intake pipe, and was capable of producing 55% of rated power. The left engine had seven severely worn cam lobes. The rudder trim was deflected full left at impact. The evidence indicated that the pilot had retarded the throttle for the left engine and was using only the right engine to sustain flight. Exam of company checklist usage revealed several different improper versions. The pilot and five passengers were killed. Two others passengers and two people on the ground were injured.

Cause: Human factor

Occupants & Outcome

Crew On Board

1

Passengers On Board

7

Estimated Survivors

2

Fatality Rate

75.0%

Known people on board: 8

Operational Details

Schedule / Flight

Kenai - Anchorage

Flight Type

Scheduled Revenue Flight

Flight Phase

Takeoff (climb)

Crash Site

Airport (less than 10 km from airport)

Region / Country

North America • United States of America

Aircraft Details

Registration

N496SC

MSN

31-7752077

Year of Manufacture

1977