Federal Aviation Administration May 18, 2009 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 Propellers
This supplemental NPRM revises an earlier proposed airworthiness directive (AD), applicable to Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 propellers. That proposed AD would have required initial and repetitive visual inspections of propeller blade root outer sleeves for cracks, and removal before further flight of propeller blades with cracked blade root outer sleeves. That proposed AD resulted from mandatory continuing airworthiness information (MCAI) issued by the European Aviation Safety Agency (EASA) to identify and correct an unsafe condition on certain Dowty propellers. This supplemental NPRM revises the proposed AD to correct the listing of propeller models affected. This supplemental NPRM results from the discovery that we need to correct one of the propeller model numbers affected, and to remove an erroneous propeller model number. We are proposing this AD to prevent blade counterweight release, which could result in injury or damage to the airplane. The MCAI describes the unsafe condition as:
Airworthiness Directives; Pratt & Whitney (PW) JT9D-7R4 Series Turbofan Engines; Correction
The FAA is correcting airworthiness directive (AD) 2009-10-01, which was previously published in the Federal Register. That AD applies to PW JT9D-7R4 series turbofan engines. In the Federal Register, the AD number in the CFR citation of the headings section is incorrect. This document corrects that AD number. In all other respects, the original document remains the same.
Airworthiness Directives; Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 Propellers
This supplemental NPRM revises an earlier proposed airworthiness directive (AD), applicable to Dowty Propellers Models R354/4-123-F/13, R354/4-123-F/20, R375/4-123-F/21, R389/4-123-F/25, R389/4-123-F/26, and R390/4-123-F/27 propellers. That proposed AD would have required initial and repetitive visual inspections of propeller blade root outer sleeves for cracks, and removal before further flight of propeller blades with cracked blade root outer sleeves. That proposed AD resulted from mandatory continuing airworthiness information (MCAI) issued by the European Aviation Safety Agency (EASA) to identify and correct an unsafe condition on certain Dowty propellers. This supplemental NPRM revises the proposed AD to correct the listing of propeller models affected. This supplemental NPRM results from the discovery that we need to correct one of the propeller model numbers affected, and to remove an erroneous propeller model number. We are proposing this AD to prevent blade counterweight release, which could result in injury or damage to the airplane. 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, 747SR, and 747SP Series Airplanes
The FAA is correcting typographical errors in an existing airworthiness directive (AD) that was published previously in the Federal Register. The error resulted in two incorrect paragraph references. This AD applies to certain Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This AD requires repetitive detailed inspections of the aft pressure bulkhead for indications of ``oil cans'' and previous oil can repairs at reduced compliance times, and corrective actions if necessary.
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