Airworthiness Directive · Amendment 39-15582 · Ice and rain protection
ATR Model ATR42-200, -300, -320, -500 Airplanes; and Model ATR72-101, -201, -102, -202, -211, -212, and -212A Airplanes
This AD applies to ATR Model ATR42-200, -300, -320, and -500 airplanes and Model ATR72-101, -201, -102, -202, -211, -212, and -212A airplanes; certificated in any category; all serial numbers; except for airplanes having ATR Modification 05469 installed in production, or installed in service in accordance with Avions de Transport Regional Service Bulletin ATR42-30-0072 or ATR72-30-1042, both Revision l, both dated June 1, 2005; as applicable.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions.
(1) Within 550 flight hours after the effective date of this AD, measure the heating resistance of the three pitot probes, in accordance with the Accomplishment Instructions of Avions de Transport Regional Service Bulletin ATR42-30-0074 or ATR72-30-1044, both Revision 01, both dated September 26, 2007, as applicable. If any resistance exceeds 50 ohms, before next flight, replace the pitot probe in accordance with the Accomplishment Instructions of the applicable service bulletin. Repeat the measurement thereafter at intervals not to exceed 550 flight hours, until the current sensors have been replaced as required by paragraph (f)(2) of this AD.
(2) Within 5,000 flight hours after the effective date of this AD, replace the three pitot probe current sensors, in accordance with the Accomplishment Instructions of Avions de Transport Regional Service Bulletin ATR42-30-0072 or ATR72-30-1042, both Revision 1, both dated June 1, 2005, as applicable. Doing this paragraph ends the repetitive inspections required by paragraph (f)(1) of this AD.
(3) Actions are also acceptable for compliance with the requirements of paragraph (f)(1) of this AD if done before the effective date of this AD in accordance with the Accomplishment Instructions of Avions de Transport Regional Service Bulletin ATR42-30-0074 or ATR72-30-1044, both dated May 14, 2007, as applicable.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
