{"id":"F2005L02378","name":"AD/PA-44/18 Amdt 1 - Combustion Heater Fuel Pumps","slug":"ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36783,"registerId":"commonwealth-F2005L02378-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-44 (Seminole) Series Aeroplanes","sectionType":"division","heading":"Piper PA-44 (Seminole) Series Aeroplanes","content":"### Piper PA-44 (Seminole) Series Aeroplanes\n\n| AD/PA-44/18 Amdt 1 | Combustion Heater Fuel Pumps | 10/2005 |\n| ------------------ | ---------------------------- | ------- |\n\n```html\n

Applicability:

Group 1: The New Piper Aircraft, Inc. aeroplanes retained from AD/PA44/18 original issue:

Model

Serial Nos.

PA-44-180

44-7995001 through 4496168.

PA-44-180T

44-8107001 through 44-8207020.

Group 2: The New Piper Aircraft, Inc. aeroplanes (not included in AD/PA44/18 original issue) added to the applicability of this Directive:

Model

Serial Nos.

PA-44-180

4496169 through 4496190.

Requirement:

1. Group 1 aeroplanes:

(a) Visually inspect any installed aircraft heater fuel pump (model 91E92-1 or model 91E93-1) for leakage in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127, dated 26 February 2003, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110A, dated 6 March, 2003.

(b) If any leak is found, inspect the pump sealing surface for abnormalities (for example, nicks, gouges, or warping). Correct any abnormality found. If any abnormality cannot be corrected, replace the header fuel pump in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110A.

\n```\n\n| | (c) Do not install any heater fuel pump (model 91E92-1 or model 91E93-1) unless you have visually inspected the pump for leakage and corrected any abnormalities specified in Requirement 1(b) of this Directive in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110A.2. Group 2 aeroplanes:(a) Visually inspect any installed aircraft heater fuel pump (model 91E92-1 or model 91E93-1) for leakage in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127B, dated 18 April 2005, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110B, dated 20 December 2004.(b) If any leak is found, inspect the pump sealing surface for abnormalities (for example, nicks, gouges, or warping). Correct any abnormality found. If any abnormality cannot be corrected, replace the heater fuel pump in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127B, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110B.(c) Do not install any heater fuel pump (model 91E92-1 or model 91E93-1) unless you have visually inspected the pump for leakage and corrected any abnormalities specified in Requirement 2(b) of this Directive in accordance with The New Piper Aircraft, Inc. Service Bulletin No. 1127B, and Kelly Aerospace Power Systems Service Information Letter Bulletin No. A-110B.Note: FAA AD 2005-15-10 Amdt 39-14199 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | 1. Group 1 aeroplanes:(a) Remains unchanged as Within the next 10 hours time in service (TIS) after 27 June 2003 (the effective date of the original issue of this Directive).(b) Prior to further flight.(c) From the effective date of this Directive.2. Group 2 aeroplanes:(a) Unless already accomplished, within the next 10 hours TIS, after the effective date of this Directive.(b) Before further flight after the inspection required in Requirement 2(a) of this Directive.(c) From the effective date of this Directive. |\n\n| | This Amendment becomes effective on 29 September 2005. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Background: | The original issue of this Directive required a one- time inspection of the combustion heater fuel pumps for fuel leakage. If leakage was found, repair or replacement of the fuel pump was undertaken. This Directive retains all those actions and includes additional serial numbers for the Models PA-44-180 aeroplanes in the applicability section. This Directive results from further investigation that concluded that additional fuel pumps that did not meet the quality control (inspection or design) requirements of the Directive had been installed in Models PA-44-180 aeroplanes. Quality control problems with the heater fuel pump could result in failure of the heater fuel pump. Such failure could lead to fire or explosion in the cockpit. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n18 August 2005","sortOrder":0},{"sectionNumber":"AD/PA-44/18 Amdt 1","sectionType":"part","heading":"AD/PA-44/18 Amdt 1","content":"## AD/PA-44/18 Amdt 1","sortOrder":1},{"sectionNumber":"Combustion Heater Fuel Pumps","sectionType":"part","heading":"Combustion Heater Fuel Pumps","content":"## Combustion Heater Fuel Pumps","sortOrder":2},{"sectionNumber":"10/2005","sectionType":"part","heading":"10/2005","content":"## 10/2005","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment retains the original one‑time inspection and corrective/replacement actions but expands applicability by adding additional PA-44-180 serial numbers (4496169 through 4496190) and updates the applicable service bulletin references for the newly included group (Background; Applicability; Requirement 2)."},"complexity_factors":["Two distinct applicability groups with specific serial-number ranges (Group 1: original retained serials; Group 2: additional serials added by this amendment) (Applicability).","Different service bulletin references and dates for Group 1 (Service Bulletin No. 1127; Kelly A-110A) versus Group 2 (Service Bulletin No. 1127B; Kelly A-110B) requiring matching compliance actions (Requirement 1(a)-(c); Requirement 2(a)-(c)).","Multiple action types required: visual inspection for leakage, inspection of sealing surface for abnormalities, correction where possible, replacement where not, and an installation prohibition unless inspection/correction completed (Requirement 1(b)-(c); Requirement 2(b)-(c)).","Short and staged compliance timings (e.g. within next 10 hours TIS, before further flight, from effective date) that differ by group and action (Compliance table).","Cross-reference to external FAA Airworthiness Directive (FAA AD 2005-15-10) and reliance on manufacturer/service-information procedures, creating dependency on external documents for procedural detail (Note; Requirement references).","Identification requirement limited to specific pump models (91E92-1, 91E93-1) and may impose parts-replacement costs and immediate maintenance scheduling burdens on operators (Requirements and Background)."],"plain_english_summary":"- This directive requires visual inspection of certain heater fuel pumps (models 91E92-1 and 91E93-1) on specified Piper PA-44 Seminole aeroplanes for fuel leakage, correction of any sealing-surface damage, and replacement if defects cannot be fixed. It also prohibits installing those pumps unless inspected and corrected. Operators/owners must have maintenance personnel carry out actions per the cited Piper and Kelly Aerospace service bulletins, within short flight-time limits (e.g. within 10 hours TIS or before further flight). The stated purpose is to reduce risk of heater-pump failure that could lead to fire or explosion."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original directive (effective June 2003) covered specific serial numbers of PA-44 aircraft. This amendment expands the scope by adding Group 2 — 22 additional PA-44-180 aircraft (serial numbers 4496169 through 4496190) that were not originally covered. The expansion resulted from further investigation revealing additional defective pumps had been installed in aircraft outside the original applicability."},"complexity_factors":["Two distinct applicability groups with different serial number ranges and different technical reference documents (Service Bulletin 1127 vs 1127B)","Cross-references to four external technical documents (two service bulletins and two information letters, with different versions for each group)","Nested conditional requirements: inspection → if leak found → inspect surface → if abnormality found → repair or replace","Three-part compliance structure for each group (initial inspection, immediate action if defects found, ongoing installation restriction)","Multiple effective dates and compliance timeframes (original 2003 date vs amendment 2005 date)","Incorporation by reference to FAA AD 2005-15-10 (foreign regulatory cross-reference)"],"plain_english_summary":"This AD orders owners/operators of specified Piper PA‑44 Seminoles to visually inspect cabin‑heater fuel pumps (models 91E92‑1/91E93‑1) for leaks and sealing‑surface damage, and to repair or replace pumps that cannot be made serviceable. It expands the original directive to add 22 more aircraft and prohibits installing these pumps unless inspected and cleared. The rule addresses fuel‑leak risk that could lead to fire or explosion in the cockpit."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps","history":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps/history","analysis":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps/analysis","conflicts":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps/conflicts","importantCases":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps/important-cases","documents":"/api/acts/ad-pa-44-18-amdt-1-combustion-heater-fuel-pumps/documents"}}