AD 80-11-04    Cracked Nutplates

June 2, 1980

This AD applies to all Cessna 150F-M, all A150s, All F150s, FA150s, FRA150s, and ’78-’80 152s and A152s. 

(In other words, all swept tail 150s, and the early 152s)

This AD requires visual inspection of the 8 nutplates installed on the Vertical Fin attach brackets for cracks which, if allowed to go undetected, could result in the separation of the vertical or vertical and horizontal tail assembly. This visual inspection is required every 100 hours.

Compliance with this AD is no longer required if the nutplates are replaced with nuts.

80-11-04 CESSNA: Amendment 39-3782. Applies to the following models and serial number airplanes certificated in all categories:

ModelsSerial Numbers
150F15061533through15064532
150G15064533through15067198
150H15067199through15069308
150J15069309through15071128
150K15071129through15072003
150L15072004through15075781
150M15075782through15079405
A150KA1500001throughA1500226
A150LA1500227throughA1500523
A150MA1500524throughA1500734
15215279406through15284541
A152A1520735throughA1520943
F150FF150-0001throughF150-0067
F150GF150-0068throughF150-0219
F150HF150-0220throughF150-0389
F150JF150-0390throughF150-0529
F150KF15000530throughF15000658
F150LF15000659throughF15001143
F150MF15001144throughF15001428
FA150KFA15000O1throughFA1500081
FA150LFA1500082throughFA1500120
FRA150LFRA1500121throughFRA1500261
FRA150MFRA1500262throughFRA1500336
F152F15201429throughF15201803
FA152FA1520337throughFA1520372


COMPLIANCE: Required as indicated unless already accomplished.

To detect cracked NAS 1068A4 nutplates which, if allowed to go undetected, could result in separation of the vertical or vertical and horizontal tail assembly from the airplane, within 100 hours time-in-service after the effective date of this AD, and every 100 hours time-in-service thereafter, accomplish the following:

A) Using a suitable light and mirror visually inspect the eight NAS 1068A4 nutplates installed on the Part Number 0432004-9 vertical fin aft attach bracket for cracks in the threaded part (nut body) and/or base of the nutplate and replace any cracked nutplates prior to further flight.

B) Compliance with this AD is no longer required if the NAS 10684A nutplates are replaced with AN365-428, MS20365-428, MS2l042L4 or MS21044N4 nuts.

C) Any equivalent method of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas 67209.

NOTE: Cessna Single Engine Service Information Letter SE79-49, Revision # 1, dated April 28, 1980, pertains to the subject.

The AD supersedes AD 78-07-10, Amendment 39-3174 (43 FR 14958, 14959).

This Amendment 39-3782 becomes effective June 2, 1980.

 Return