Service difficulty report · Blocker Door · Doug DC1010

Difficulty date
February 6, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N1839U
Make and model
Doug DC1010
Aircraft serial
46633
Engine
Ge CF66D
Part
Blocker Door
Part number
9007M62G16
Condition
Failed
Location
Nr 2 Tr Unit
Part time
58,000 hours
Component
Ge
Stage of operation
LD
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

UPON DEPLOYING REVERSERS AT LAX ON 1/9/96, LOST NR 2 RT REV. TRANSLATING COWL. FOUND BROKEN IN SEVERAL PIECES. UPPER BLOCKER DOOR FAILED CAUSING DOOR TO JAM BETWEEN COWL AND CORE STRUCTURE. THIS CAUSED ACTUATOR ATTACH FITTINGS TO SHEAR, LIBERATING THE COWL. COWL SPLIT AT FWD BONDMENT. REPLACED NR 2 RT REVERSER. FAIL-SAFE FASTENERS WILL BE ADDED AT THE FITTING TO BLOCKER DOOR ATTACHMENT ON ALL OLD STYLE DOORS, AT SHOP VISIT. THE INSPECTION DOCUMENT WILL BE REVISED TO SPECIFICALLY CHECK THE FITTING FOR LOOSENESS OR BOND FAILURE AT EACH C-CHECK.

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