No fatalities

1 Apr 2011: BOEING 737 300 (N632SW) — SOUTHWEST AIRLINES CO — Yuma, AZ

Yuma, AZ, United States

On 1 Apr 2011, a BOEING 737 300 (registration N632SW) operated by SOUTHWEST AIRLINES CO was involved in an aviation accident near Yuma, AZ. No fatalities were reported. Investigators recorded the probable cause as: the improper installation of the fuselage crown skin panel at the S-4L lap joint during the manufacturing process, which resulted in multiple site damage fatigue cracking and eventual failure of the lower skin panel. This summary draws on records from NTSB; 17 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards
BOEING 737 300
Photo: San Diego Air & Space Museum Archives / Public domain, via Wikimedia Commons

On April 1, 2011, Southwest Airlines Flight 812, a Boeing 737-3H4, experienced a rapid decompression while climbing through FL340. The crew diverted to Yuma International Airport. One crewmember and one passenger sustained minor injuries; the aircraft had substantial fuselage damage.

Incident Description

On April 1, 2011, at about 1558 mountain standard time (MST), Southwest Airlines Flight 812, a Boeing 737-3H4 (registration N632SW), experienced a rapid decompression while climbing through flight level 340 (FL340). The flight crew executed an emergency descent and diverted the airplane to Yuma International Airport (NYL) in Yuma, Arizona.

Injuries and Damage

The airplane was carrying 5 crewmembers and 117 passengers. During the incident, one crewmember and one nonrevenue off-duty airline employee passenger sustained minor injuries. A postaccident inspection revealed that the airplane had sustained substantial damage: a section of fuselage skin approximately 60 inches long by 8 inches wide had fractured and flapped open on the upper left side above the wing.

Flight Details

The flight was conducted under 14 Code of Federal Regulations (CFR) Part 121 as a regularly scheduled domestic passenger flight from Phoenix Sky Harbor International Airport, Phoenix, Arizona, to Sacramento International Airport, Sacramento, California.

Contributing factors

Causes

Incorrect service/maintenance

Other contributing factors

Cabin crew