Airworthiness Directive · Amendment 39-14336 · Boeing Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes
Boeing Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes
This AD applies to all Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD requires examining the airplane's maintenance records to determine if the main landing gear (MLG) has been overhauled and if Titanine JC5A (also known as Desoto 823E508) corrosion- inhibiting compound ("CIC") was used during the overhaul. For airplanes for which the maintenance records indicate that further action is necessary, or for airplanes on which CIC JC5A may have been used during manufacture, this AD requires a one-time detailed inspection for discrepancies of certain components of the MLG, and corrective action if necessary. This AD results from twelve reports of severe corrosion on one or more of three components of the MLG. We are issuing this AD to prevent collapse of the MLG, or damage to hydraulic tubing or the aileron control cables, which could result in possible departure of the airplane from the runway and loss of control of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of Boeing Service Bulletin 737-32A1367, Revision 1, dated December 23, 2004.
For all airplanes: Before the inspection required by paragraph (h) of this AD, examine the airplane records to determine if the MLG has been overhauled, and, for any overhauled MLG, if JC5A corrosion inhibiting compound (CIC) was used on the trunnion pin or other parts of the MLG.
(1) For airplanes identified in the service bulletin as Group 2 and Group 4: If records indicate conclusively that the MLG has not been overhauled, no further action is required by this paragraph or paragraph (h) of this AD.
(2) For airplanes identified in the service bulletin as Group 1, Group 2, Group 3, and Group 4: If records indicate conclusively that the MLG has been overhauled and that CIC JC5A was not used on the trunnion pins or other parts of the MLG during the most recent overhaul, no further action is required by this paragraph or paragraph (h) of this AD.
For all airplanes, except as provided by paragraph (g)(1) and (g)(2) of this AD: At the applicable compliance time in paragraph (h)(1) or (h)(2) of this AD, do a detailed inspection for discrepancies of the applicable MLG components specified in the service bulletin. Do all applicable corrective actions before further flight after the inspection. Do all the actions in accordance with the service bulletin, except as required by paragraph (i) of this AD.
(1) For airplanes identified in the service bulletin as Group 1 and Group 3 for which records indicate conclusively that the MLG has not been overhauled: Inspect at the later of the times in paragraph (h)(1)(i) and (h)(1)(ii) of this AD.
(i) Within 48 months after the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness.
(ii) Within 6 months after the effective date of this AD.
(2) For airplanes identified in the service bulletin as Group 1, Group 2, Group 3, and Group 4, for which records indicate conclusively that the MLG has been overhauled, and for which records indicate conclusively that CIC JC5A was used during the most recent overhaul; and for airplanes for which records do not show conclusively which CIC compound was used during the most recent overhaul: Inspect at the later of the times in paragraph (h)(2)(i) or (h)(2)(ii) of this AD.
(i) Within 48 months after the landing gear was installed.
(ii) Within 6 months after the effective date of this AD.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
(i) If any discrepancy is found during any inspection required by this AD, and the service bulletin specifies to contact Boeing for appropriate action: Before further flight, do the action using a method approved in accordance with paragraph (l) this AD.
As of the effective date of this AD, no person may use CIC JC5A on an MLG component on any airplane.
Actions done before the effective date of this AD in accordance with Boeing Alert Service Bulletin 737-32A1367, dated August 19, 2004, are considered acceptable for compliance with the corresponding action specified in this AD.
