Thu, Aug 09, 2012
AD NUMBER: 2012-15-13
PRODUCT: All Model 747-100B SUD, 747-300, 747-400, and 747-400D series airplanes; and Model 747-200B series airplanes having a stretched upper deck.
SUBJECT: Airworthiness Directive 2012-15-13
ACTION: Final Rule
SUMMARY: The FAA is uperseding an existing airworthiness directive (AD) for the products listed above. The existing AD currently requires repetitively inspecting for cracking or discrepancies of the fasteners in the tension ties, shear webs, and frames at body stations 1120 through 1220; and related investigative and corrective actions if necessary. That AD requires modifying the frame-to-tension-tie joints at body stations 1120 through 1220 (including related investigative actions and corrective actions if necessary), which provides a terminating action for the repetitive inspections. That AD also requires new repetitive inspections after the modification, corrective actions if necessary, and additional modification requirements at a specified time after the first modification. That AD also removed certain airplanes from the applicability. That AD was prompted by reports of cracked and severed tension ties, broken fasteners, and cracks in the frame, shear web, and shear ties adjacent
to tension ties for the upper deck.
This AD revises the existing AD by adding repetitive open hole high frequency eddy current (HFEC) inspections for cracking in the forward and aft tension tie channels, and repair if necessary. For certain airplanes, this AD also requires a one-time angle inspection to determine if the angle is installed correctly, and re-installation if necessary; and a one-time open hole HFEC inspection at the fastener locations where the tension tie previously attached to the frame prior to certain modifications, and repair if necessary. This AD also, for the Stage 2 inspections, reduces the initial compliance times for those inspections. The FAA is issuing this AD to detect and correct cracking of the tension ties, shear webs, and frames of the upper deck, which could result in rapid decompression and reduced structural integrity of the airplane.
DATES: This AD is effective September 12, 2012.
FMI: AD
More News
Aero Linx: International Flying Farmers IFF is a not-for-profit organization started in 1944 by farmers who were also private pilots. We have members all across the United States a>[...]
From 2017 (YouTube Version): Remembrances Of An Israeli Air Force Test Pilot Early in 2016, ANN contributor Maxine Scheer traveled to Israel, where she had the opportunity to sit d>[...]
"We renegotiated what our debt restructuring is on a lot of our debts, mostly with the family. Those debts are going to be converted into equity..." Source: Excerpts from a short v>[...]
Also: B-29 Superfortress Reunion, FAA Wants Controllers, Spirit Airlines Pulls Back, Gogo Galileo Van's Aircraft posted a short video recapping the goings-on around their reorganiz>[...]
Chart Supplement US A flight information publication designed for use with appropriate IFR or VFR charts which contains data on all airports, seaplane bases, and heliports open to >[...]
ANN's Daily Aero-Linx (04.15.24)
See All