DCA08MA076

NTSB accident investigation · Boeing 767 · San Francisco, CA · June 28, 2008

Accident · No injuriesClass 1 · MajorFinal report
Date
June 28, 2008, 10:15 local (17:15 UTC)
Place
San Francisco, CA
Injuries
2 uninjured
Damage
Destroyed
Phase of flight
Standing
Aircraft
N799AXBoeing 767
Defining event
Standing-engine(s) start-up: Electrical system malf/failure
Status
Completed · report March 28, 2010
Report
Board-adopted at Board Meeting
Investigation class
Class 1
NTSB office
Major Investigations Division
Parties
Boeing, FAA
Safety recommendations
Yes
FAA report
20080628839489A
Case key
68326

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The NTSB’s determination of the probable cause, and any contributing factors.

The design of the supplemental oxygen system hoses and the lack of positive separation between electrical wiring and electrically conductive oxygen system components. The lack of positive separation allowed a short circuit to breach a combustible oxygen hose, release oxygen, and initiate a fire in the supernumerary compartment that rapidly spread to other areas. Contributing to this accident was the Federal Aviation Administration’s failure to require the installation of nonconductive oxygen hoses after the safety issue concerning conductive hoses was initially identified by Boeing.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings.

Analysis

The Safety Board’s full report is available at http://www.ntsb.gov/publictn/A_Acc1.htm. The Aircraft Accident Report number is NTSB/AAR-09/04/SUM. On June 28, 2008, about 2215 Pacific daylight time, an ABX Air Boeing 767-200, N799AX, operating as flight 1611 from San Francisco International Airport, San Francisco, California, experienced a ground fire before engine startup. The captain and the first officer evacuated the airplane through the cockpit windows and were not injured, and the airplane was substantially damaged. The cargo flight was operating under the provisions of 14 Code of Federal Regulations Part 121. At the time of the fire, the airplane was parked near a loading facility, all of the cargo to be transported on the flight had been loaded, and the doors had been shut.

Factual narrative

The Safety Board’s full report is available at http://www.ntsb.gov/publictn/A_Acc1.htm. The Aircraft Accident Report number is NTSB/AAR-09/04/SUM. On June 28, 2008, about 2215 Pacific daylight time, an ABX Air Boeing 767-200, N799AX, operating as flight 1611 from San Francisco International Airport, San Francisco, California, experienced a ground fire before engine startup. The captain and the first officer evacuated the airplane through the cockpit windows and were not injured and the airplane was substantially damaged. The cargo flight was operating under the provisions of 14 Code of Federal Regulations Part 121. At the time of the fire, the airplane was parked near a loading facility, all of the cargo to be transported on the flight had been loaded, and the doors had been shut.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident.

Aircraft

Registration
N799AX
Reported as
Boeing 767 (281)
Category
Airplane
Serial number
23432
Airframe hours
47,068
Engines
general electric CF6-80A, turbo jetgeneral electric CF6-80A, turbo jet
Damage
Destroyed
Fire
On-Ground
Flight
Part 121
Operator
ABX Air, doing business as Dhl
Registered owner
ABX Air, Inc
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · June 28, 2008
Flight plan
Unknown
Airport
SFO · San Francisco International

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
54
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Medical
Class 1, With waivers/limitations
Last flight review
February 18, 2008
Seat
Left
Flight hours
11,469 total
Role
Co-pilot
Age
42
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Medical
Class 1, Without waivers/limitations
Last flight review
April 18, 2008
Seat
Right
Flight hours
5,275 total

Docket · 41

The files NTSB released with the investigation on February 25, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 48.6 MB in all.

Operations 2 - Factual Report of Group ChairmanItem 1 · .PDF · 754 KBOperations 2 - Attachment 1 - Interview SummariesItem 2 · .PDF · 49 KBOperations 2 - Attachment 2 - Flight PapersItem 3 · .PDF · 7.4 MBOperations 2 - Attachment 3 - 767 Operating Manual ExcerptItem 4 · .PDF · 9.4 MBOperations 2 - Attachment 4 - Flight Operations Manual ExcerptItem 5 · .PDF · 1.8 MBSurvival Factors 6 - Factual Report of Group ChairmanItem 6 · .PDF · 267 KBSurvival Factors 6 - Factual Report of Group Chairman ERATTAItem 7 · .PDF · 16 KBSurvival Factors 6 - Attachment 1 Door OperationItem 8 · .PDF · 869 KBSurvival Factors 6 - Attachment 2 - SFO Accident Incident ReportItem 9 · .PDF · 303 KBSurvival Factors 6 - Attachment 3 - FAA Memo ABX 1611 Communication with Ground ControlItem 10 · .PDF · 53 KBSurvival Factors 6 - Attachment 4 Airport Event ChronologyItem 11 · .PDF · 565 KBSurvival Factors 6 - Attachment 5 Witness StatementsItem 12 · .PDF · 256 KBSurvival Factors 6 - Attachment 6 PhotographsItem 13 · .PDF · 164 KBSurvival Factors 6 - Attachment 7 SFO Video of Firefighting ActivitiesItem 14 · .PDF · 13 KBSurvival Factors 6 - Addendum 1Item 15 · .PDF · 95 KBAirworthiness Factual Report of Group ChairmanItem 16 · .PDF · 2.8 MBAirworthiness Group Chairman's Errata and AddendumItem 17 · .PDF · 222 KBFlight Data Recorder 10 - Specialist's Factual ReportItem 18 · .PDF · 16 KBMaintenance Records 11 - Factual Report of Group ChairmanItem 19 · .PDF · 109 KBMaintenance Records 11 - Attachment 1 - Operating CertificateItem 20 · .PDF · 113 KBMaintenance Records 11 - Attachment 2 - ABX Service CheckItem 21 · .PDF · 654 KBMaintenance Records 11 - Attachment 3 - ABX MEL Defect LogItem 22 · .PDF · 683 KBMaintenance Records 11 - Attachment 4 - ABX STC - Cargo ConversionItem 23 · .PDF · 1.5 MBMaintenance Records 11 - Attachment 5 - ABX AD Status ReportItem 24 · .PDF · 226 KBMaintenance Records 11 - Attachment 6 - ABX SDR and MISR ReportsItem 25 · .PDF · 1.0 MBMaintenance Records 11 - Attachment 7 - ABX Major Repairs and AlterationsItem 26 · .PDF · 360 KBMaintenance Records 11 - Attachment 8 - ABX Oxygen System Maintenance DocumentsItem 27 · .PDF · 2.1 MBMaintenance Records 11 - Attachment 9 - ABX Supernumerary Log PagesItem 28 · .PDF · 580 KBMaintenance Records 11 - Attachment 10 - ABX Weight and Balance Computer InstallationItem 29 · .PDF · 478 KBMaintenance Records 11 - Attachment 11 - ABX Galley Light InstallationItem 30 · .PDF · 946 KBMaintenance Records 11 - Attachment 12 - ABX Mechanic InterviewsItem 31 · .PDF · 36 KBMaintenance Records 11 - Attachment 13 - ABX Corrective ActionsItem 32 · .PDF · 21 KBMaintenance Records 11 - ABX Air, Inc. FAA PMI StatementItem 33 · .PDF · 21 KBCockpit Voice Recorder 12 - Factual Report of Group ChairmanItem 34 · .PDF · 202 KBCockpit Voice Recorder 12 - ErrataItem 35 · .PDF · 16 KBMaterials Laboratory 15 - Factual Report 08-116Item 36 · .PDF · 1.4 MBMaterials Laboratory 15 - Group Chairman Fire Factual ReportItem 37 · .PDF · 6.6 MBMaterials Laboratory 15 - Flexible Oxygen Line Fire Test Factual ReportItem 38 · .PDF · 2.9 MBComputed Tomography Specialist Factual ReportItem 39 · .PDF · 3.3 MBParty Submission - The Boeing CompanyItem 40 · .PDF · 291 KBMaintenance Records 11 - Group Chairman's Factual Report ErrataItem 41 · .PDF · 27 KB

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.