80-08-01 R1 BOEING: Amendment 39-3735 as amended by Amendment 39-4003. Applies to all Model 727 airplanes in passenger service: Before July 1, 1981, accomplish either A or B on all Model 727 airplanes operating in passenger service with the aft ventral stairway panels removed.\n \n\tA.\tNormal passenger access to the ventral stairway is not permitted. Install a conspicuous placard having one-half inch high red letters on a white background containing the words, "Emergency Exit Only, Not for Normal Passenger Use," on the ventral stairway sidewall panel P/N 65-70711 or in a location approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region. Alternate methods of compliance may be approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region.\n \n\tB.\tInstall the original panels per FAA approved type design or other panels found to be equivalent by the FAA. An FAA Maintenance Inspector may determine if other than original panelsare acceptable or designs may be submitted to the Chief, Engineering and Manufacturing Branch, FAA Northwest Region for approval. \n\n\tAmendment 39-3735 became effective April 17, 1980. \n\n\tThis amendment 39-4003 becomes effective January 5, 1981.