AD 84-19-04

84-19-04 TELEDYNE CONTINENTAL: Letter issued September 19, 1984. Applies to Teledyne Continental Motors TSIO-520-BE reciprocating engines incorporating part number 646571-1 fuel pumps of the following serial numbers:

Fuel Pump Assembly Serial Number Engine Serial Number (Reference) E108405B 528044 E108406B 528065 E108407B 528056 E108408B 528054 E108409B 528060 E108410B 528062 E108411B 528061 E108412B 528064 E108413B 528049 E158413B 528023 E158414B 528066 E168401B 528068 E168403B 528069 E168404B 528067 F018401B 528073 F081402B 528071 F018403B 528072 F068403B 528070 F158403B 528077 F158405B 528081 F158406B 528079 F188401B 528084 F188405B 528082 F198411B 528085

Compliance is required as indicated unless already accomplished. To prevent loss of fuel pressure from possible failure of the engine driven fuel pump, accomplish the following: Prior to further flight, remove the engine driven fuel pump assembly and replace with a serviceable pump. NOTE: Fuel pumps of the above listed part number and serial numbers may be reinstalled after modification of the drive mechanism by Teledyne Continental Motors. Modified pumps will be identified by a "K" permanently marked in the upper right hand corner of the fuel pump name plate. In addition, temporary identification of the modified pumps is provided by a purple color on the high pressure aneroid housing. Upon request of an operator, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Atlanta Aircraft Certification Office, Federal Aviation Administration. This airworthiness directive becomes effective upon receipt.