Casualties unknown

1989-07-06: Boeing A75 (N747JR) — Sacramento, CA

Sacramento, CA, US

On July 6, 1989, a Boeing A75 (registration N747JR) was involved in an aviation accident near Sacramento, CA. Investigators recorded the probable cause as: The pilot's inability to maintain control of the aircraft due to a loss of engine power caused by an obstruction in the air induction system, which was found to be blocked with friction tape. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

An aircraft experienced engine power loss shortly after takeoff, leading to an emergency landing that resulted in a collision with a hangar. Investigation found the air induction system blocked by friction tape.

What happened

Shortly after takeoff, the pilot noticed the engine beginning to lose power. Declaring an emergency, the pilot was cleared to land on any available runway at the airport. The aircraft successfully reached the airport area but subsequently collided with a hangar before striking the ground.

The investigation

A post-accident inspection of the aircraft revealed significant obstructions within the air induction system. Investigators found that the system appeared to be blocked by a large amount of friction tape. Additionally, another junction within the induction system was wrapped with the same type of material, indicating improper maintenance or installation practices.

Findings

The primary factor contributing to the accident was fuel induction blockage caused by foreign objects. The presence of friction tape in the air induction system prevented proper airflow, leading to engine failure. This mechanical issue resulted in the loss of power during the critical takeoff phase, necessitating an emergency landing that could not be completed safely due to the proximity of structures.

Safety message

Proper maintenance procedures are critical to ensure that no foreign objects remain in the air induction system. Regular inspections should verify that all components are free from obstructions such as tape or debris that could impair engine performance.

Probable cause

The pilot's inability to maintain control of the aircraft due to a loss of engine power caused by an obstruction in the air induction system, which was found to be blocked with friction tape.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X28862. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.