69-12-01: Air Induction Hose

69-12-01 PIPER: Amdt. 39-773 applies to PA-28R-180 series airplanes, Serial Numbers 28-30004 through 28-31092 and to PA-28R-200 series airplanes, Serial Numbers 28-35000 through 28-35237, 28-35239 through 28-35251 and 38-35253 through 28-35256. Compliance required as indicated. To prevent the possibility of restricting air flow through the engine air induction system, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this airworthiness directive, unless already accomplished, remove air induction inlet hose Piper Part Number 63633-43 and inspect for deterioration, broken or frayed cord wrapping, evidence of hose partially collapsed, indication of reinforcement wire slippage or evidence of wire not being bonded properly to the hose interior wall, especially in the vicinity of the Koroseal ties or clamps. (b) If the hose shows any deterioration, as noted in (a), remove it from service. Install an airworthy hose, Piper P/N 63633-43, or Aero-Duct SCAT 3-1/4 O.D. hose, or MIL-H- 8796B Type 1 Class 3 hose, 22-1/2 long, making sure that the wire reinforcing coils extend over the pilot tubes at each end and under the clamps. Piper Kit 760 328 may be installed in lieu of duct replacement. (See Item (d) below). (c) Repeat the inspections of item (a) above at intervals not to exceed 10 hours' time in service. These inspections need not be continued after installation of Piper Kit 760 328. (d) Within the next 50 hours' time in service after the effective date of this AD, unless already accomplished, install a new Piper air induction hose installation Kit No. 760 328 in accordance with the instructions included with the kit. (e) The inspection or kit installation time intervals (other than for the initial inspection) may be adjusted by an FAA inspector up to a maximum of 5 hours to coincide with aircraft annual or 100-hour scheduled inspections. Other means of compliance with the requirements of this directive may be utilized, if approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. (Piper Service Bulletin No. 297 covers this same subject.) This amendment becomes effective 10 June 1969.