Pratt & Whitney R-1340 'Wasp' series Reciprocating Engines
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators and maintenance personnel should visually inspect the cylinder heads at the exhaust port and valve housing area during each on-wing inspection required by AD 99-11-02, using 10X or greater magnification, and replace any cracked cylinders. During engine overhaul, fluorescent-penetrant inspection of the entire cylinder is recommended, with replacement of cracked cylinders. No specific compliance deadlines are mandated in this bulletin.
Summary
The FAA Special Airworthiness Information Bulletin SAIB: NE-09-09 provides information regarding potential cylinder head cracking at the exhaust port on Pratt & Whitney R-1340 series reciprocating engines. This bulletin alerts owners, operators, repair facilities, and FAA inspectors about the risk of engine power loss and forced landings due to this issue. The bulletin does not mandate actions but offers recommendations to enhance safety for aircraft equipped with these engines.
What changed
SAIB NE-09-09 introduces recommendations to visually inspect the cylinder heads around the exhaust port and valve housing during on-wing inspections and to perform fluorescent-penetrant inspections of the entire cylinder during overhaul. These inspections extend beyond the scope of the existing AD 99-11-02, which only covers cooling fins near the spark plug bosses.
Why it matters
This bulletin matters because cylinder head cracking can lead to engine power loss and forced landings, posing safety risks to aircraft operations. For maintenance and compliance teams, it highlights the need to expand inspection areas to detect cracks early and prevent potential in-flight engine failures. Operators and MROs benefit from proactive maintenance guidance to avoid costly repairs and enhance aircraft reliability.
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