Service difficulty report · Spar · Boeing 73779P

Difficulty date
September 8, 2021
Submitted
September 30, 2021
Operation
Air carrier
Aircraft
N7826B
Make and model
Boeing 73779P
Aircraft serial
30035
Aircraft time
50,751 hours, 33,909 cycles
Part
Spar
Condition
Corroded
Location
Vertical Stab
Stage of operation
NR
How discovered
9
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

PITTING ON DORSAL FIN FRONT SPAR FITTING RH BOLT (STA 1016) AT VERTICAL STABILIZER (1EA) ; 2021-403818 / [01] REMOVED RH BOLT ON DORSAL FIN FRONT SPAR FITTING AT VERTICAL STABILIZER (STA 1016) IAW B737-700 AMM 55-30-00-000-801 STEP 2F(7)(B) AND PERFORMED GENERAL VISUAL INSPECTION ON BORE ADJACENT AREA AND NOT FOUND DAMAGE.; [02] STEP 1 COMPLETE CERTIFIED; [03] OK TO INSTALL NEW BOLT ON DORSAL FIN FRONT SPAR FITTING AT VERTICAL STABILIZER ON RH SIDE (STA 1016) IAW B737-700 AMM 55-30-00-400-801 STEP 3G(3).; [04] OK GRANTED; [05] INSTALLED NEW BOLT ON DORSAL FIN FRONT SPAR FITTING AT VERTICAL STABILIZER ON RH SIDE (STA 1016) IAW B737-700 AMM 55-30-00-400-801 STEP 3H(1)(D) THRU STEP 3H(1)(F).; [06] CORRECTIVE ACTION FROM STEP 5 INSTALLED NEW BOLT ON DORSAL FIN FRONT SPAR FITTING AT VERTICAL STABILIZER ON RH SIDE (STA 1016) IAW B737-700 AMM 55-30-00-400-801 STEP 3H(1)(D) THRU STEP 3H(1)(F). TOOL USED:TORQUE 40-200 P/N: QD2R200 S/N 0718904669 DUE DATE: 30 DEC 21; TORQUE 200-1000 P/N QD2R1000A S/N: 0319122576 DUE DATE 31 OCT 21; [07] COMPLETE STEP 6 RII CERTIFIED; [08] REMOVED AND REPLACED BOLT ON DORSAL FIN FRONT SPAR FITTING AT VERTICAL STABILIZER ON RH SIDE (STA 1016) IAW B737-700 AMM 55-30-00-000-801 STEP 2F(7)(B) AND IAW B737-700 AMM 55-30-00-400-801 STEP 3H(1)(D) THRU STEP 3H(1)(F). TOOL USED:TORQUE 40-200 P/N: QD2R200 S/N 0718904669 DUE DATE: 30 DEC 21; TORQUE 200-1000 P/N QD2R1000A S/N: 0319122576 DUE DATE 31 OCT 21.; [09] JOB COMPLETED AND CERTIFIED AS RII.

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