Date:	Wednesday 2 October 1991
Time:
Type:	Boeing 747-246B
Owner/operator:	Japan Air Lines - JAL
Registration:	JA8161
MSN:	22990/579
Year of manufacture:	1983
Total airframe hrs:	38786 hours
Cycles:	3376 flights
Engine model:	Pratt & Whitney JT9D-7R4G2
Fatalities:	Fatalities: 0 / Occupants:
Aircraft damage:	Unknown
Category:	Accident
Location:	near Tokyo -   Japan
Phase:	En route
Nature:	Passenger - Scheduled
Departure airport:	Tokyo-Narita Airport (NRT/RJAA)
Destination airport:	Chicago-O'Hare International Airport, IL (ORD/KORD)

Narrative:
The aircraft was climbing through FL165 when the force from hot liquid released from a burst pipe in the pressurization system, blew a 1 mx70cm hole in the fuselage beneath the port wing. The pilot dumped fuel and returned to Tokyo. Because of previous problems, JAL was replacing the air ducts with thicker ones. This aircraft was scheduled for a replacement March 1992.

Aviation Week & Space Technology 14 October 1991 (32)
Flight International 9-15 October 1991

Date/time	Contributor	Updates