Service difficulty report · Stiffener · Boeing 73776N

Difficulty date
July 15, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N7723E
Make and model
Boeing 73776N
Aircraft serial
32670
Aircraft time
48,099 hours, 24,239 cycles
Part
Stiffener
Condition
Cracked
Location
Horizontal Stab
Stage of operation
IN
How discovered
V
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

RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB; AT STABILIZER STATION 129.50; 3RD VERTICAL STIFFENER IS CRACKED. ; / [01] CUT 0UT AND REMOVED DAMAGED SECTION AT VERTICAL STIFFENER OF THE RIB L= .80; W=.312 STATION 129.50 3RD VERTICAL STIFFENER PER SRM 55-10-09-2R; [02] DO A HFEC INSPECTION OF THE CUT EDGES OF THE STIFFENER AND WEB AND ALL EXISTING FASTENER HOLES PER SRM 55-10-09-2R-4 STEP 4 C; D; [03] VERIFIED CUT 0UT AND REMOVED DAMAGED SECTION AT VERTICAL STIFFENER OF THE RIB L= .80; W=.312 STATION 129.50 3RD VERTICAL STIFFENER PER SRM 55-10-09-2R; [04] ET INSPECTED CUT EDGE/HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23 AND PROCEDURE 16; NO CRACKS NOTED.<BR>CAL ID IS000450 N500D; [05] DO A GENERAL VISUAL INSPECTION OF ALL AREAS WITHIN THE REPAIR AREA PER SRM 55-10-09-2R-4 STEP 4 E; [06] ACCOMPLISHED A GENERAL VISUAL INSPECTION OF ALL AREAS WITHIN THE REPAIR AREA PER SRM 55-10-09-2R-4 STEP 4 E NO FAULTS FOUND; [07] FABRICATED -1 T SECTION FROM 60-5872 7075T76511 LOT #1463618-1 ; -2 REPIR ANGLE FROM BAC1490-2793 7075T62 LOT # 1449279-1 AND -3 SHIMS 2 EA FROM 7075T6 .020' LOT # J000046012 AT <BR>RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB; AT STABILIZER STATION 129.50; 3RD VERTICAL STIFFENER PER SRM 55-10-09-2R-4 OK TO TREAT AND PRIME PARTS; [11] INSTALLED REPAIR PARTS AT R/H HORIZONTAL STABILIZER INSPAR RIB; AT STABILIZER STATION 129.50 3RD VERTICAL STIFFENER PER SRM 55-10-09-2R-4 STEP 4 M;N;O;P;

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