Airworthiness Directives

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62-23-05 LYCOMING: Amdt. 501 Part 507 Federal Register October 30, 1962. Applies to All GO, IGO, GSO and IGSO Series Lycoming Engines Listed in Lycoming Service Bulletin No. 290 When Installed in Twin Engine Aircraft With Full Feathering Hartzell Propellers:

MODEL SERIES APPLICABLE SERIAL NOS. EXCEPTED SERIAL NOS.
GO-435 3306-11 through 3324-11 3315-11 and 3316-11
GO-580-B 1161-28 through 1221-28 1173-28
GO-480-F 607-29 through 614-29
GO-480-D 402-32 through 404-32
GSO-480 3010-33 through 3065-33 3336-33 through 3338-33
GO-480-C and -G 1446-34 through 1492-34 1481-34 and 1483-34 through 1488-34
GO-480-C and -G 1315-35 through 1326-35
GO-480-C and -G 219-37 through 290-37 276-37, 286-37, 287-37 and 289-37
GO-480-G 203-42 and 204-42
IGSO-480 701-44 through 1038-44 755-44, 756-44, 797-44, 798-44, 833-44,
834-44, 1007-44 through 1012-44, 1014-44
through 1016-44, 1022-44 through 1025-44
IGO-540 101-49 through 226-49 204-49 through 207-49, 210-49,
211-49, 214-49, 217-49, 223-49, 224-49
IGSO-540 101-50 through 537-50 322-50, 323-50, 395-50, 439-50, 442-50,
443-50, 450-50 through 452-50, 478-50
through 482-50, 484-50, 485-50, 489-50,
490-50, 495-50, 498-50, 501-50 through
509-50, 511-50 through 513-50, 516-50
through 521-50, 523-50, 526-50, 528-50
through 530-50, 212-50, 213-50, 215-50,
216-50, 218-50, 219-50, 303-50, 304-50,
307-50, 308-50, 326-50, 327-50, 335-50,
through 338-50, 341-50, 342-50, 345-50
through 350-50, 376-50 through 379-50,
382-50, 383-50, 387-50, 388-50, 399-50,
400-50, 402-50, 403-50, 436-50, 437-50,
460-50, 461-50, 464-50, 465-50, 468-50
through 472-50, 483-50, 486-50, 487-50,
491-50 through 494-50;
and to Remanufactured and Factory Overhauled Engines shipped from the Lycoming Division During the Period of February 16, 1961, through August 31, 1962; and to All Applicable Engines Overhauled at Facilities Other than the Manufacturer, in Which the Provisions of Lycoming Service Instruction No. 1033 Have Been Incorporated. (Note: If the Compliance Status of Service Instruction No. 1033 is Unknown, Inspection per this AD is Required.)
Compliance required within 10 hours' time in service after the effective date of this AD; 25 hours' time in service after the first inspection; 25 hours' time in service after the second inspection, and every 100 hours' time in service thereafter.
To detect excessive wear of the propeller shaft oil seal rings, a propeller oil leakdown inspection shall be made in accordance with the instructions contained in Lycoming Service Bulletin No. 290. These inspections shall be continued until Lycoming P/N 67722 propeller shaft oil seal rings are installed in the reduction gear assembly at which time the inspections may be discontinued. Reduction gear assemblies incorporating P/N 67722 oil seal rings shall be identified by stamping an "M" following the reduction gear serial number on the machined pad to the right side of the timing plug in the reduction gear housing.
(Lycoming Service Bulletin No. 290 covers this subject.)
This directive effective November 14, 1962.


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