Airworthiness directives › 2003-08-01
AD 2003-08-01 Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co KG, Model Tay 650-15 Turbofan Engines
Models named: Tay 650-15 turbofan. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD is applicable to Rolls-Royce Deutschland Ltd. & Co KG (RRD) Model Tay 650-15 turbofan engines with low pressure (LP) turbine stage 2 rotor discs, part number (P/N) JR32319, and LP turbine stage 3 rotor discs, P/N JR32320A, that have a serial number (SN) listed in Table 1 of this AD. These engines are installed on, but not limited to Fokker F.28 Mark 0100 airplanes. Table 1 follows: Table 1.—Disc SNs Last known engine SN LP turbine stage 2 rotor disc, part No. JR32319, SNs LP turbine stage 3 rotor disc, part No. JR32320A, SNs 17251 EETM1355 DETM1853/A 17255 DETM19039 DETM19007 17256 SETM11283 SETM15065 17273 PETM718 DETM14896/A 17275 DETM17343 DETM17546 17280 EETM1808 SETM14410 17281 DETM19036 DETM18999 17282 EETM2163 DETM3703/A 17300 SETM12109 SETM11379 17301 DETM18772 DETM18348 17327 EETM2510 DETM15404/A 17332 SETM20088 SETM21297 17365 SETM15166 SETM15188 17393 DETM17083 DETM16860 17437 EETM19304 DETM19008 17563 EETM4414 DETM15583/A 17618 EETM5010 DETM9588/A
Compliance
Compliance with this AD is required as indicated, unless already done. Visual Inspections (f) Perform an initial visual inspection of the LP turbine stage 2 rotor disc and LP turbine stage 3 rotor disc for corrosion within 11,700 cycles-in-service (CIS) after the effective date of this AD. Information on performing visual inspections can be found in RRD engine manual task 72-52-23-200-000 and task 72-52-24-200-000 respectively. Discs That Fail Inspection (g) Before further flight, do the following for discs that fail inspection: (1) Replace any LP turbine stage 2 rotor discs and LP turbine stage 3 rotor discs found with corrosion pits beyond repairable limits. Information on repairable limits may be found in RRD Engine Manual Task 72-52-23-200-000 and Task 72-52-24-200-000 respectively. (2) Repair any LP turbine stage 2 rotor discs and LP turbine stage 3 rotor discs found with corrosion pits within repairable limits. Information on repairable limits may be found in RRD Engine Manual Task 72-52-23-200-000 and Task 72-52-24-200-000 respectively. Repetitive Visual Inspections (h) Perform repetitive visual inspections of the LP turbine stage 2 rotor disc and LP turbine stage 3 rotor disc for corrosion within every 11,700 cycles-since-last inspection. Information on performing visual inspections can be found in RRD Engine Manual Task 72-52-23-200-000 and Task 72-52-24-200-000 respectively. (i) Disposition discs that fail inspection as specified in paragraph (g) of this AD. Alternative Methods of
Unsafe condition
This AD was prompted by reports of excessive corrosion found during LP turbine stage 2 rotor disc and LP turbine stage 3 rotor disc inspection. The actions specified in this AD are intended to prevent uncontained LP turbine stage 2 rotor disc or LP turbine stage 3 rotor disc failure due to excessive corrosion, and damage to the airplane.
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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