Boeing 727-200 N308AS

Summary

On 13 June 1988 at about 05:17 local time, a Boeing 727-200 registered N308AS, operated by Alaska Airlines, Inc., was involved in an incident near Seattle, Washington, United States. 88 people were on board and 7 had minor injuries. The aircraft was slightly damaged. No probable cause statement is available for this record.

Date

13 June 1988 at 05:17

Classification

Incident

Location

Seattle, Washington, United States

Nearest airport

Seattle-Tacoma Int'l. (SEA)

Coordinates

47.3003, -122.3101

Aircraft

Boeing 727-200

Registration

N308AS

Category

Airplane

Engines

3

Operator

Alaska Airlines, Inc.

Operating rule

Part 121: Air Carrier

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Portland → Seattle

Aircraft damage

Minor

Weather

VMC

Light

Night/Dark

NTSB number

SEA88IA108

7 people had minor injuries.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

AFTER THE MAIN GEAR TOUCHED DOWN, THRUST LEVERS WERE PLACED IN THE IDLE REVERSE POSITION. ONCE THE AIRCRAFT'S NOSE GEAR CONTACTED THE RUNWAY, BRAKING AND FULL REVERSE THRUST WAS APPLIED. THE AIRCRAFT STARTED TO DRIFT TO THE LEFT OF THE RUNWAY CENTERLINE. THE PILOT APPLIED ASYMMETRICAL BRAKING WITH NO CHANGE IN DIRECTIONAL CONTROL. THE PILOT THEN COMBINED THE USE OF ASYMMETRICAL BRAKING WITH ASYMMETRICAL REVERSE THRUST. AS A FINAL EFFORT TO PREVENT THE AIRCRAFT FROM DEPARTING THE RUNWAY, THE CAPTAIN USED THE TILLER. THE AIRCRAFT CAME TO REST ON A GRASSY AREA BETWEEN THE PARALLEL RUNWAYS. THE AIRCRAFT IS EQUIPPED WITH 'LIGHTWEIGHT' CLAMSHELL THRUST REVERSERS. THE RIGHT HAND THRUST REVERSER ON THE NUMBER 2 ENGINE WAS FOUND FAILED IN THE OPEN (FORWARD THRUST) POSITION. THRUST REVERSER LIGHTS DID NOT INDICATE ANY ABNORMALITIES. AN OVERSTRESS FRACTURE OF THE LOWER INNER HINGE WITH A FATIGUE FRACTURE THROUGH THE FLANGE OF THE UPPER OUTER HINGE WAS FOUND BY METALLURGICAL EXAMINATION.

Quoted verbatim from the NTSB record.