AD 2012-08-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Corrosion on analog transient suppression devices (ATSDs), which could result in the loss of high voltage transient protection (e.g., lightning protection) in the fuel tanks and consequent fuel tank explosion and loss of the airplane.
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Required Actions
Revise the maintenance program to incorporate certain limitations specified in Goodrich Principal Instructions for Continued Airworthiness Manual for the Analog Transient Suppression Device Installation Applicable to Boeing 737-100 through -500 Airplanes Supplemental Type Certificate--ST00146BO, Document T3044-0010-0101, Revision D, dated September 26, 2011. Ensure compliance with these limitations within the specified times.
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Compliance Time
Within 3 months after the effective date of this AD, revise the maintenance program. Initial compliance for each task is at the applicable time specified in the Goodrich manual or within 18 months after the effective date, whichever is later.
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Affected Aircraft
The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category, with an original airworthiness certificate or original export certificate of airworthiness issued before September 26, 2011, equipped with analog transient suppression devices (ATSDs) installed in accordance with Supplemental Type Certificate ST00146BO.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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