Service difficulty report · Angle · Boeing 73779P

Difficulty date
September 15, 2021
Submitted
October 18, 2021
Operation
Air carrier
Aircraft
N7826B
Make and model
Boeing 73779P
Aircraft serial
30035
Aircraft time
50,751 hours, 33,909 cycles
Part
Angle
Condition
Cracked
Location
Center Wing Box
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

CRACKED ANGLE BS 695, RBL 24.5 FLOOR STRUCTURE AT CENTER WING BOX. REMOVED ANGLE NO FOUND ALLOWABLE DAMAGE LIMITS IAW SRM 51-40-02, MEASURE OF CRACK IS L=1.58. PERFORMED VISUAL INSPECTION ON ADJACENT AREA AND NO MORE FOUND DAMAGE. FORMED ANGLE IAW DWG 273A9112, SHEET 30, REV. HEAT TREATED TO 7075-T73 IAW DWG 273A9112 SHEET 30 REV- AND BAC 5602 TABLE IV AND TABLE XI. DRILLED HOLES IAW DWG 273A9112, SHEET 30, REV-, 51-40-05. APPLIED PROTECTIVE TREATMENT ON ANGLE AND NEW HOLES IAW SRM 52-40-02. INSTALLED REPAIR ANGLE IAW SRM 51-10-02 STEP 9, 51-40-02, AND DWG 273A9112 REV -.

More about the Boeing 737-79P