{"id":"F2006B06407","name":"AD/PW-P/19 - Cylinder Head Inspection","slug":"ad-pw-p-19-cylinder-head-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47744,"registerId":"commonwealth-F2006B06407-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PW-P/19 - Cylinder Head Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPratt and Whitney Piston Engines\n\nAD/PW-P/19 Cylinder Head Inspection 8/99\n\nApplicability: Pratt and Whitney R-1340 series piston engines.\n\nRequirement: 1. Visually inspect cylinder heads for cracking in accordance with Pratt and Whitney Service Bulletin 1787 dated 7 September 1983, Part B.\n\n2. Perform a fluorescent penetrant inspection (FPI) of cylinder heads for cracks in accordance with Pratt and Whitney Service Bulletin 1787 dated 7 September 1983, Part A.\n\nNote: FAA AD 99-11-02 also refer.\n\nCompliance: 1\\. a. For cowled and baffled installations, initially inspect within 125 hours time in service from the effective date of this directive, and thereafter at intervals not to exceed 250 hours time in service since the last inspection.\n\n    b. For all other installations, initially inspect within 50 hours time in service from the effective date of this directive, and thereafter at intervals not to exceed 100 hours time in service since the last inspection.\n\n    2. At each cylinder overhaul after the effective date of this directive. This Airworthiness Directive becomes effective on 12 August 1999.\n\nBackground: This directive is prompted by reports of cylinder head cracking that has led to loss of engine power, forced landings and aircraft damage.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a focused, single-issue airworthiness directive addressing cylinder head cracking in a specific engine series. The scope remains tightly constrained to the original safety concern without expansion into unrelated maintenance areas."},"complexity_factors":["Short, single-purpose directive (approximately 250 words)","Only 2 defined inspection methods referenced externally (visual and FPI)","Simple conditional structure with two installation types (cowled/baffled vs other)","Clear compliance timeline with specific hour-based intervals","Single cross-reference to FAA AD 99-11-02 and Pratt and Whitney Service Bulletin 1787","No nested exceptions or complex definitional sections"],"plain_english_summary":"This rule requires regular visual and fluorescent-penetrant inspections of cylinder heads on Pratt & Whitney R‑1340 series piston engines, following Service Bulletin 1787. It applies to aircraft owners/operators and maintenance personnel.\n\nIt matters because undetected cylinder‑head cracks can cause sudden engine failure, forced landings, and injury. Inspection intervals are stricter for poorly cooled installations and inspections are also required whenever a cylinder is overhauled."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive keeps a narrow scope: it applies to Pratt & Whitney R-1340 series engines and prescribes inspections per Service Bulletin 1787 to address reported cylinder-head cracking. It does not broaden applicability or add regulatory powers beyond the specified inspection and compliance intervals."},"complexity_factors":["Reference to external service instructions: inspections must follow Pratt & Whitney Service Bulletin 1787 (Requirement 1, Parts A and B).","Two inspection methods required: visual inspection (Part B) and fluorescent penetrant inspection (FPI, Part A) — different skills/equipment needed (Requirement 1).","Staggered compliance intervals by installation type: cowled/baffled vs other installations, creating monitoring/admin differences (Compliance 1.a–b).","Mandated inspection at each cylinder overhaul in addition to scheduled intervals adds recurring compliance events (Compliance 2).","Need to track engine hours/time-in-service precisely to meet interval thresholds (Compliance 1.a–b).","Cross-reference to FAA AD 99-11-02 may affect operators using FAA guidance or doing international maintenance (Note).","Technical judgment and access to FPI services may be required, raising operational and cost considerations (Requirement 1)."],"plain_english_summary":"This Airworthiness Directive requires operators of Pratt & Whitney R‑1340 piston engines to carry out periodic visual and fluorescent penetrant inspections of cylinder heads in accordance with Pratt & Whitney Service Bulletin 1787. Compliance intervals differ by installation (longer for cowled and baffled installations) and inspections are also required at every cylinder overhaul. CASA mandates compliance; operators pay for and must schedule inspections by hours-in-service tracking. The AD follows reports of cylinder head cracking that led to power loss and forced landings."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw-p-19-cylinder-head-inspection","history":"/api/acts/ad-pw-p-19-cylinder-head-inspection/history","analysis":"/api/acts/ad-pw-p-19-cylinder-head-inspection/analysis","conflicts":"/api/acts/ad-pw-p-19-cylinder-head-inspection/conflicts","importantCases":"/api/acts/ad-pw-p-19-cylinder-head-inspection/important-cases","documents":"/api/acts/ad-pw-p-19-cylinder-head-inspection/documents"}}