Airworthiness Directive · Amendment 39-16842 · Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-710 Series Turbofan Engines
Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-710 Series Turbofan Engines
This AD applies to all Rolls-Royce Deutschland BR700-710A1-10 and BR700-710A2-20 turbofan engines, all BR700-710C4-11 model engines that have hardware configuration standard 710C4-11 engraved on the engine data plate (Service Bulletin SB-BR700-72-101466 standard not incorporated), and all BR700-710C4-11 model engines that have hardware configuration standard 710C4-11/10 engraved on the engine data plate (Service Bulletin SB-BR700-72-101466 standard incorporated). These engines are installed on, but not limited to, Bombardier BD-700-1A10 and BD-700-1A11 airplanes and Gulfstream GV (G500) and GV-SP (G550) airplanes.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued 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 30 days after the effective date of this AD, revise the airworthiness limitations section (ALS) of the operators' approved maintenance program (reference the Time Limits Manual (TLM), chapters 05-00-01 and 05-00-02 of the applicable engine manuals (EMs)) to remove the requirement to record each touch-and-go or overshoot as 1/5 of a flight cycle (FC) on an engine installed on an airplane used for Pilot Training.
(2) Within 30 days after the effective date of this AD, revise the ALS of the operators' approved maintenance program (reference the TLM, chapters 05-00-01 and 05-00-02 of the applicable EMs) to add a requirement to record each touch-and-go or overshoot as 1 FC to the life of all critical parts and the fan blades.
(3) Within 120 days after the effective date of this AD, determine the number of touch-and-go's and overshoots that each individual critical part except the fan shaft and LP turbine rotor shaft has experienced since entry into service for Pilot Training.
(i) If the number of touch-and-go's and overshoots on an individual critical part is less than one percent of the total number of FCs on the critical part, no further action is required by this AD.
(ii) If the number of touch-and-go's and overshoots on an individual critical part is one percent or more of the total number of FCs on the critical part, disregard the previous calculations of life on that individual critical part and retrospectively re-calculate the accumulated FCs of that individual critical part by the addition of one FC for every touch-and-go and overshoot to the total number of FCs.
A touch-and-go is a phase of a flight where a landing approach of an airplane is continued to the touch-down point and the airplane immediately takes off again without stopping.
(g) An overshoot is a phase of a flight where a landing approach of an airplane is not continued to the touch-down point. This includes missed approaches due to safety reasons, weather minimums, airplane engine configurations, runway incursions, and any other undetermined causes.
This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) and/or service information as follows:
(1) This AD requires within 30 days after the effective date of this AD, revising the ALS of the operators' approved maintenance program (reference the TLM chapters 05-00-01 and 05-00-02 of the applicable EMs) to remove the requirement to record each touch-and-go or overshoot as 1/5 of a FC on an engine installed on an airplane used for Pilot Training, and adding a requirement to record each touch-and-go or overshoot as 1 FC to the life of all critical parts and the fan blades. The MCAI requires that the revised method of life counting for each touch-and-go and overshoot be accomplished within 4 months.
(2) The MCAI requires determining the total number of touch-and-go's and overshoots that each individual critical part (except the fan shaft and LP turbine rotor shaft) has experienced since entry into service. This AD only requires determining those numbers for touch-and-go's and overshoots that had occurred during Pilot Training.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
