Airworthiness directives › 2005-25-11
AD 2005-25-11 Airworthiness Directives; Rolls-Royce plc RB211 Trent 800 Series Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc (RR) models RB211 Trent 875-17, Trent 877-17, Trent 884-17, Trent 884B-17, Trent 892-17, Trent 892B-17, and Trent 895-17 turbofan engines, with low pressure (LP) compressor fan blades, part number FW18548 installed. These engines are installed on, but not limited to, Boeing 777 series airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Actions Required for LP Compressor Fan Blades (f) Replace LP compressor fan blades with new or previously reworked LP compressor blades before accumulating the specified cycles-since-new (CSN) in the following Table 1, or rework the existing blades as specified in paragraph (g) of this AD. Table 1.—LP Compressor Fan Blade Replacement or Rework Schedule Boeing 777 Series: Airplane maximum gross weight (times 1,000 pounds) RB211 Trent Engine Model Replace or rework LP compressor fan blades before accumulating: -300 660, 632.5 -884, -892, -884B 2,400 CSN. -200 656 -892, -895 2,400 CSN. -200 648 -892, -892B 3,200 CSN. -200 632.5 -892B 3,200 CSN. -200 632.5 -892 4,100 CSN. -200 555 -884 4,100 CSN. -200 545 -877 4,100 CSN. -200 535 -875 4,100 CSN. -200 506 -875 4,100 CSN. (g) Rework LP compressor fan blades at or before accumulating the specified CSN in Table 1 of this AD. Follow paragraphs 3.B.(1) through 3.B.(22) of Accomplishment Instructions of RR service bulletin (SB) No. RB.211-72-E044, Revision 2, dated October 8, 2004, to do the blade rework. (h) For engines moved between configurations, calculate the cycles remaining using either of the following: (1) Subtract the total CSN from the most limiting configuration's limit from Table 1 of this AD; or (2) Calculate the cycles remaining using the following equation: ER13DE05.008 Where: Xr = Cycles remaining in current configuration. Lc = Cyclic limit of current configuration from Table 1 of this AD. Xn = Cycles accumulated in configuration n. Ln = Cyclic limit in configuration n from Table 1 of this AD. (i) Information on the source life of the cycle limits in Table 1 of this AD can be found in RR Alert SB No. RB.211-72-AE055, Revision 3, dated May 28, 2004. Alternative Methods of
Unsafe condition
This AD results from a number of new production LP compressor blades found with surfaces formed outside of design intent. We are issuing this AD to prevent possible multiple uncontained LP compressor fan blade failure, due to cracking in the blade root caused by increased stresses in the shear key slots.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1