TFE731: New Oil Tank Instruction Plate

December 2010

Honeywell has issued two Category II Reliability Service Bulletins (SB) TFE731-79-3070 R1 and TFE731-79-5120 for the installation of new instruction plate decals on oil tanks to help prevent oil over-servicing.

SB 731-79-3070 R1 is applicable to 731-3/-4/-5/-5B engines
SB 731-79-5120 is applicable to 731-50 engines

Attention Falcon Operators

At this time, these SBs are not applicable to Falcon aircraft, except the Falcon 50-4.

Honeywell Compliance Recommendations

Service Bulletin	Complied with	Relevant Engines
SB 79-3070 R1	next 600-800 hour routine periodic inspection	731-3 engines
	next 300-400 hour routine periodic inspection	731-4/-5/-5B engines
SB 79-5120	next scheduled routine periodic inspection	731-50 engines

These Service Bulletins are covered by MSP.

VIBROPEEN Warning

Compliance with the SBs will change the part number (PN) of the oil tanks. All oil tanks must be re-identified with the new PN using an electrochemical etch process to a depth of .001”.

Do Not Use VIBROPEEN to re-identify the oil tanks. This will cause the oil tank to be scrapped and not covered by MSP.

TFE731 Technical Support

Heier, Shane - Engine Tech Rep - Lincoln, NE (LNK). Aviation professional since 1991. Airframes: Astra, Challenger, Citation, Falcon, Hawker, Learjet, Global, Westwind Engines: TFE731, CF34, JT15D, CFE738, ALF502, AE3007 A/C, PT6A Turboprop, APUs, FJ44, 617F-E, PW300, PW500, PW600, Williams FJ44, Rolls Royce Spey & Tay, Rolls Royce BR700, AS907 Direct: 402.479.8166 Mobile: 402.304.3332

Walker, Bill - Engine Tech Rep - Battle Creek, MI (BTL). Aviation professional since 1979. Airframes: Astra, Challenger, Citation, Embraer, Falcon, Gulfstream, Hawker, Learjet, King Air, Global, Westwind Engines: TFE731, CF34, JT15D, CFE738, ALF502, AE3007 A/C, PT6A Turboprop, APUs, FJ44, 617F-E, PW300, PW500, PW600, Williams FJ44, Rolls Royce Spey & Tay, Rolls Royce BR700, AS907 Direct: 269.969.8486 Mobile: 269.317.5526

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