Service difficulty report · Spar Cap · Boeing 747271C

Difficulty date
July 27, 2007
Submitted
August 24, 2007
Operation
Air carrier
Aircraft
N537MC
Make and model
Boeing 747271C
Aircraft serial
22403
Aircraft time
97,429 hours, 19,113 cycles
Part
Spar Cap
Condition
Damaged
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

HORIZONTAL STAB RT UPPER AFT DAMAGED HOLE AT RT VERTICAL SPAR CAP. INBD OF RBL 43.5 INBD UPPER AND LOWER FASTENER HOLE (CENTER SECTION) WAS NOTED DURING OPEN HOLE HFEC INSPECTION (NDT). COULD NOT ACQUIRE GOOD HFEC INDICATION DUE TO HOLE DAMAGE. REAMED DAMAGED HOLES TO 2ND OVERSIZE (.403-.406) IAW SB 747-55A2050 NDT FINDS NO DEFECTS BOLTS INSTALLED ON CARD 8010 / 8011.