AD 2003-22-14 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Models Tay 650-15 and 651-54 Turbofan Engines

Models named: F.28 Mark 0100, Boeing 727-100 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) (formerly Rolls-Royce plc) models Tay 650-15 turbofan engines with fan blades, part numbers (P/Ns) JR31911, JR31912, JR33865, JR33866, JR35120, or JR35121, installed in fan discs P/N JR31198A, and Tay 651-54 turbofan engines with fan blades P/Ns JR31911, JR31912, JR33865, or JR33866, installed in fan discs P/N JR34563A. These engines are installed on, but not limited to, Fokker Model F.28 Mark 0100, and Boeing 727-100 series airplanes modified in accordance with Supplemental Type Certificate (STC) SA8472SW (727-QF).

You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Record Operation in Prohibited Operating Ranges (f) If an engine is operated inadvertently in reverse thrust within the prohibited ranges described in RRD Service Bulletin (SB) No. Tay 72-1447, Revision 4, dated May 8, 2002, paragraph 1.C., as applicable by engine model, then before further flight make an entry in the engine records that reflects that operation. If known, include the stabilized N1 speed in the engine records. Inspections (g) Perform initial and repetitive ultrasonic inspections (UI) of fan blades each time an engine is operated inadvertently in reverse thrust within the prohibited ranges described in RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002, paragraph 1.C., as specified in the following Table 1: Table 1. Initial and Repetitive Inspection Criteria Airplane and engine model N1 alert system status (installed per Fokker SB F100-31-060) Was this a powerback event? If inadvertent reverse thrust event was: Then before next flight: (1) Fokker 0100; Tay 650-15 (i) Installed and operative (A) No Between 57% and 75% N1 speed for 7.5 seconds or more Perform UI and if necessary, disposition parts in accordance with paragraphs 3. and 3.A. of RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002.   (B) Yes Between 57% and 75% N1 speed for 7.5 seconds or more Perform UI and if necessary, disposition parts in accordance with paragraphs 3. and 3.B. of RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002.   (ii) Not installed, or installed but not operative (A) No N1 speed above idle for any reason Perform paragraphs 3. and 3.A. of RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002, unless it can be proven by flight data recorder information that engine operation between 57% and 75% N1 speed lasted less than 7.5. seconds.   (B) Yes Between 57% and 75% N1 speed If it can be determined that the event lasted for 2 seconds or less, go to paragraph (h) of this AD. Otherwise, perform UI and if necessary, disposition parts in accordance with paragraphs 3. and 3.B. of RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002, unless it can be proven by flight data recorder information that engine operation between 57% and 75% N1 speed lasted less than 7.5 seconds. (2) Boeing 727-QF; Tay 651-54 Not applicable Not applicable Between 57% and 75% N1 speed for 7.5 seconds or more, or if the parameters cannot be confirmed Perform UI and if necessary, disposition parts in accordance with paragraphs 3. and 3.A. of RRD SB No. Tay 72-1447, Revision 4, dated May 8, 2002. One Flight-Cycle Allowance for Tay 650-15 Engines (h) You may operate a Tay 650-15 engine that has an N1 alert system installed but not operative, or that does not have an N1 alert system installed, for 1 flight cycle before downloading the flight data recorder information as required in (1)(ii)(B) of Table 1 of this AD, if the flight crew determines that the operation in the prohibited speed range during a powerback event was 2 seconds or less. Alternative Methods of

This AD is prompted by updated prohibited ranges of engine operation and the introduction of an N1 Alert System in Fokker Model F.28 Mark 0100 airplanes with Tay 650-15 engines installed. The actions specified in this AD are intended to prevent fan blade failures, which can result in an uncontained engine failure, engine fire, and damage to the airplane.