Airworthiness directives › 2004-25-22
AD 2004-25-22 Airworthiness Directives; Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 Airplanes
Makes named: lycoming. Models named: 2T-1A-1, 2T-1A-2. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
(c) This AD affects all Model 2T-1A-1 and 2T-1A-2 airplanes that have a Lycoming IO-360-B1F6, AIO-360-B1G6, or AEIO-360-B1G6 engine installed and are certificated in any category.
Required actions
(e) To address this problem, you must do the following: Actions Compliance Procedures (1) Perform the following: (i) Visually inspect the aircraft induction system drain fitting located in the induction elbow below the fuel injector for blockage or restriction. (ii) If the hole is blocked or restricted in the weld area or not drilled through the elbow, open up the restricted hole or drill a hole in the elbow at the fitting location using a No. 10 (.193) drill. For all affected airplanes: Inspect within the next 25 hours time-in-service (TIS) after January 28, 2005 (the effective date of this AD). Before further flight, modify the blocked or restricted aircraft induction system drain fitting Not applicable. (2) Visually inspect the alternate air door for distortion, heat damage, and cracks. If any damage is found, repair or fabricate a new door following Figure 1, Figure 2, and Figure 3 in this AD For airplanes previously affected by AD 79-20-08: Initially inspect at the next scheduled inspection required by AD 79-20-08 or within the next 25 hours TIS after January 28, 2005 (the effective date of this AD), whichever occurs later. Repetitively inspect thereafter at intervals not to exceed 100 hours TIS. For airplanes not previously affected by AD 79-20-08: Inspect within the next 25 hours TIS after January 28, 2005 (the effective date of this AD). Repetitively inspect thereafter at intervals not to exceed 100 hours TIS. For all affected airplanes: After each inspection, if damage is found during any inspection, before further flight, repair, replace the damaged alternate air door Not applicable. (3) Visually inspect the aircraft induction system for cleanliness of the air filter, distortion, security, and damage from backfire or induction system fire. If the air filter is dirty, if any distortion, damage, or lack of security is found, repair, replace or modify all affected components For airplanes previously affected by AD 79-20-08: Initially inspect at the next scheduled inspection required by AD 79-20-08 or within the next 25 hours TIS after January 28, 2005 (the effective date of this AD), whichever occurs later. Repetitively inspect thereafter at intervals not to exceed 100 hours TIS. For airplanes not previously affected by AD 79-20-08: Inspect within the next 25 hours TIS after January 28, 2005 (the effective date of this AD). Repetitively inspect thereafter at intervals not to exceed 100 hours TIS. For all affected airplanes: After each inspection, if damage is found during any inspection, before further flight, repair, replace or modify any damaged components Not applicabale.
Unsafe condition
(d) This AD is the result of heat distortion, damage, and cracks found in the aircraft induction system on Lycoming IO-360-B1F6, AIO-360-B1G6, and AEIO-360-B1G6 engines. The actions specified in this AD are intended to prevent the aircraft induction system from becoming blocked or restricted, which could result in engine failure. This failure could lead to loss of control of the airplane.
Affected ADs
(b) This AD supersedes AD 79-20-08, Amendment 39-3580.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1