This Special Airworthiness Information Bulletin NM-12-20 advises registered owners and operators of various transport category airplanes of the correct operation of Carleton Technologies Inc., oxygen system cylinder and valve assemblies having part numbers B42365-1 and B43570.

nm-12-20.pdf

Airworthiness Directives; Burl A. Rogers (Type Certificate Previously Held by William Brad Mitchell and Aeronca, Inc.) Airplanes

The FAA is adopting a new airworthiness directive (AD) 2012-04-10 for all Burl A. Rogers (type certificate previously held by William Brad Mitchell and Aeronca, Inc.) Models 15AC and S15AC airplanes. This AD was prompted by reports of intergranular exfoliation and corrosion of the upper and/or lower wing main spar cap angles found on the affected airplanes. This AD requires repetitive inspections of the upper and lower main wing spar cap angles for cracks and/or corrosion and installing inspection access panels. This AD also requires replacing the wing spar cap angles if moderate or severe corrosion is found and applying corrosion inhibitor. We are issuing this AD to correct the unsafe condition on these products.

DATES: This AD is effective April 17, 2012. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of April 17, 2012.

FAA estimates that this AD will affect 255 airplanes in the U.S. registry.

Estimated Costs Initial inspection 10 work-hours X $85 per hour = $850 Installation of inspection access panels and inspection 30 work-hours X $85 per hour = $2,550 + parts of $630 = $3,180

2012-04-10.pdf

The FAA is adopting a new airworthiness directive (AD) 2012-04-03 for BRP-Powertrain GmbH & Co KG Rotax 912 S2, 912 S3, and 914 F2 reciprocating engines. This AD requires performing a onetime inspection of the oil system for leaks and a torque check of the oil pump attachment bolts, and if leaks are detected, performing a one-time inspection of the oil pump and engine valve train, on certain serial number (S/N) BRP-Powertrain GmbH & Co KG Rotax 912 S2, 912 S3, and 914 F2 reciprocating engines. This AD was prompted by the discovery that during engine production, some engines may not have had the oil pump attachment bolts torqued to specification. We are issuing this AD to prevent oil leaks, which could result in an in-flight engine shutdown and forced landing.

DATES: This AD becomes effective March 16, 2012. We must receive comments on this AD by April 16, 2012. The Director of the Federal Register approved the incorporation by reference of BRP-Powertrain GmbH & Co KG, Rotax Aircraft Engines Mandatory Alert Service Bulletins (ASBs) No. ASB-912-060 and ASB No. 914-043 (combined in one document), dated January 26, 2012 listed in the AD, as of March 16, 2012

2012-04-03.pdf

The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan engines, including models with any dash number suffix. This AD was prompted by an engine overspeed event that occurred during taxi and resulted in a high-pressure compressor surge and tailpipe fire. This AD requires replacing Pratt & Whitney fuel metering units (FMUs), part numbers (P/Ns) 53T335 (HS 801000-1), 55T423 (HS 801000-2), and 50U150 (HS 801000-3) at the next shop visit after the effective date of this AD. We are issuing this AD to prevent engine overspeed on these engines, which could result in an uncontained engine failure and damage to the airplane.

DATES: This AD is effective April 5, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of April 5, 2012.

2012-04-04.pdf

This Special Airworthiness Information Bulletin (SAIB) alerts you, owners/operators of Cessna Aircraft Company Models 500, 501 and 550 Airplanes with an installed auxiliary fuel tank following Sierra Industries, Ltd. Supplemental Type Certificates (STC) SA80RM or SA152RM, of new instructions for continued airworthiness (ICA). CE-12-19 – Large Airplane/Cessna Aircraft Company/500 CE-12-19 – Small Airplane/Cessna Aircraft Company/501 CE-12-19 – Large Airplane/Cessna Aircraft Company/550

ce-12-19.pdf