Date: | Monday 19 October 1959 |
Time: | 16:20 |
Type: | Boeing 707-227 |
Owner/operator: | Boeing |
Registration: | N7071 |
MSN: | 17691/45 |
Year of manufacture: | 1959 |
Total airframe hrs: | 173 hours |
Engine model: | Pratt & Whitney JT4A-3 |
Fatalities: | Fatalities: 4 / Occupants: 8 |
Aircraft damage: | Destroyed, written off |
Category: | Accident |
Location: | 16 km NE of Arlington, WA -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Training |
Departure airport: | Seattle-Boeing Field International Airport, WA (BFI/KBFI) |
Destination airport: | Seattle-Boeing Field International Airport, WA (BFI/KBFI) |
Investigating agency: | CAB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The Boeing 707 N7071 was operating on a customer guarantee and acceptance training flight prior to delivery of the plane to Braniff. The plane was being flown by a Braniff captain and a Boeing testpilot as instructor. Other Braniff and Boeing personnel were on board as crew members and observers. A series of Dutch Rolls were performed; one of the rolls was executed beyond the maximum bank restrictions. Control was lost, but the aircraft recovered. During the recovery however, the no. 1, 2 and 4 engines were torn off. An intense fire burned away portions of the jet control near the no. 2 engine attachment area. An emergency descent was carried out and the plane crash-landed along river.
PROBABLE CAUSE: "The structural failure induced during an improper recovery attempt from a Dutch Roll which exceeded the angle-of-bank limits prescribed by the company."
Accident investigation:
|
| |
Investigating agency: | CAB |
Report number: | final report |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
ICAO Accident Digest, Circular 62-AN/57 (190-194)
Location
Images:
photo (c) Aviation Safety Network
Revision history:
Date/time | Contributor | Updates |