ASN logo
ASN Wikibase Occurrence # 35884
Last updated: 23 April 2021
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Date:06-FEB-1985
Time:09:43
Type:Silhouette image of generic C402 model; specific model in this crash may look slightly different
Cessna 402B
Owner/operator:Altus Airlines
Registration: N5780M
MSN: 402B-0348
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Altus, OK -   United States of America
Phase: Approach
Nature:Unknown
Departure airport:Altus, OK (AXS)
Destination airport:Oklahoma City, OK (OKC)
Investigating agency: NTSB
Narrative:
DURING AN ENG START, PRIOR TO THE FLT, THE L ENG BACKFIRED 2 OR 3 TIMES. A WITNESS DESCRIBED THE 1ST BACKFIRED AS 'THE LOUDEST I HAVE EVER HEARD.' WHEN THE ACFT TOOK OFF, TWO PERSONS LIVING NEAR THE DEPARTURE END OF THE RWY NOTED THAT THE ACFT (BELIEVED TO BE THE SAME) SOUNDED DIFFERENT & HAD A 'CLUTTERING SOUND. 'WHILE CLIMBING, THE PLT DECLARED AN EMERGENCY & REPORTED A FIRE IN THE L ENG. HE WAS VECTORED TOWARD ALTUS AFB WHILE DSCNDG IN IFR CONDITIONS. HE DSCNDD INTO VFR CONDITIONS & SAW THE airport ABOUT 3 MI AWAY. A WITNESS SAW SMOKE & FIRE TRAILING FROM THE VICINITY OF THE L ENG. HE STATED THAT THE ACFT'S NOSE CAME UP, THE PLANE ROLLED TO THE LEFT, THEN IT ENTERED A STEEP, NOSE DOWN, INVERTED ATTITUDE JUST BEFORE IT CRASHED & BURNED. AN EXAM REVEALED THE ENG EXHAUST MAINIFOLD HEADER ASSY HAD FAILED & ALLOWED HOT EXHAUST GASES TO ESCAPE IN THE ENG NACELLE IN THE VICINITY OF FUEL & OIL LINES. CORROSION HAD PROGRESSED THRU THE HEADER ASSY. AD 75-23-08 REQD GEN INSPN, BUT CONTAINED NOTE 'DO NOT REMOVE CLAMPS.' NO RECORD OF REPLACEMENT IN 6100 HRS CAUSE:

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X35690

Safety recommendations:

Safety recommendation A-86-4 issued 11 February 1986 by NTSB to FAA
Safety recommendation A-86-5 issued 11 February 1986 by NTSB to FAA


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
28-Mar-2012 03:51 Anon. Updated [Operator]
21-Dec-2016 19:22 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

Corrections or additions? ... Edit this accident description