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.
Also: Female Skydive Record, ANN November Efforts, Dream Chaser, SecTrans Reax, FAA SAFO, Able Flight, Airline Group Grounded On November 21, the Stratos 714 very light jet took to>[...]
“All three institutions have now sent a strong signal in favour of modernizing the Agency and the European aviation system as a whole. There is clear political will to ensure>[...]
Wichita-Based Center Is Authorized To Sell And Install Garmin G1000 Through G5000 Avionics On Broad Range Of Business Aircraft Yingling Aviation has been named a Garmin Integrated >[...]
Aero Linx: The Colorado Airport Operators Association (CAOA) The Colorado Airport Operators Association (CAOA) serves the common interests of the owners, operators and users of the>[...]
Downburst A strong downdraft which induces an outburst of damaging winds on or near the ground. Damaging winds, either straight or curved, are highly divergent. The sizes of downbu>[...]