Federal Aviation Administration May 23, 2008 – Federal Register Recent Federal Regulation Documents
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Petition for Exemption; Summary of Petition Received
This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.
Airworthiness Directives; Boeing Model 767 Airplanes
The FAA is revising an earlier proposed airworthiness directive (AD) for certain Boeing Model 767 airplanes. The original NPRM would have required repetitive inspections for cracking of the wing skin, and related investigative/corrective actions if necessary. The original NPRM resulted from reports of cracks found in the lower wing skin originating at the forward tension bolt holes of the aft pitch load fitting. This action revises the original NPRM by revising certain compliance times. We are proposing this supplemental NPRM to detect and correct cracking in the lower wing skin for the forward tension bolt holes at the aft pitch load fitting, which could result in a fuel leak and reduced structural integrity of the airplane.
Airworthiness Directives; Boeing Model 747SP Series Airplanes
We propose to adopt a new airworthiness directive (AD) for all Boeing Model 747SP series airplanes. This proposed AD would require repetitive lubrication of the rudder tab hinges and repetitive replacement of the rudder tab control rods. This proposed AD results from reports of freeplay-induced vibration of the control surfaces on Boeing Model 727, 737, 757, and 767 airplanes. We are proposing this AD to prevent damage to the control surface structure during flight, which could result in loss of control of the airplane.
Airworthiness Directives; Bombardier Model DHC-8-400, -401 and -402 Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Airworthiness Directives; Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR Series Airplanes
We propose to adopt a new airworthiness directive (AD) for all Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747- 200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR series airplanes. This proposed AD would require repetitive inspections for cracks or fractures of the forward end attachment and the forward lower flange of the flap tracks of the trailing edge flaps, and corrective actions if necessary. For certain airplanes, this proposed AD would also require modifying the fail-safe links of the main carriage. This proposed AD results from a detailed structural analysis of the flap attach structural and fail-safe components, accomplished as a result of a dynamic stability and control analysis, which could not demonstrate continued safe flight and landing of the airplane after the loss of a trailing edge flap. We are proposing this AD to detect and correct cracks or fractures of the primary structural and fail-safe load paths of the inboard and outboard trailing edge flaps, which could result in the loss of a flap during takeoff or landing, reducing flightcrew ability to maintain the safe flight and landing of the airplane.
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