87-05-51 BOEING, MCDONNELL DOUGLAS, LOCKHEED, DEHAVILLAND, FAIRCHILD, NIHON, AND GRUMMAN: Amendment 39-5617. Applies to the models and series airplanes listed below, certificated in any category, equipped with floor proximity emergency escape path marking systems manufactured by Plumly Airborne Products. Most of these systems were installed in accordance with Supplemental Type Certificates (STC) issued to either Plumly Airborne Products or International Aircraft Certification Service, including the following: \n\n\nSTC NO.\nAIRPLANE \nSA3500SW\nBoeing 707-323C \nSA3500SW (Rev)\nBoeing 707 Series \nSA3626SW\nBoeing 727-100 \nSA3636SW\nBoeing 727-100 \nSA3688SW\nBoeing 727-100 \nSA3689SW\nDC-9-15 \nSA3691SW\nBoeing 727-200 \nSA3694SW\nNihon YS-11A \nSA3695SW\nLockheed L-1011 \nSA3696SW\nDC-8-62, -63 \nSA3697SW\nDehavilland DHC-7 \nSA3698SW\nDC-9-15, -50, -80 \nSA3699SW\nDC-10 \nSA3700SW\nLockheed L-1011 \nSA3701SW\nNihon YS-11A \nSA3706SW\nFairchild F-27 \nSA495NE\nGrumman G-1\n\tCompliance is required as indicated, unless previously accomplished.\n \n\tTo eliminate the potential for fire due to electrical short circuits in the floor proximity lighting system, accomplish the following: \n\n\tA.\tWithin the next 48 hours after the effective date of this AD, deactivate the Plumly Airborne Products floor proximity lighting system as follows: \n\n\t\t1.\tDisconnect the control unit(s), Plumly Part Numbers PA-200, or PA-200- XX, and remove from the airplane. \n\n\t\t2.\tDisconnect the remote unit(s), Plumly Part Number PA-300, and remove from the airplane. \n\n\t\t3.\tStow all loose wires in accordance with accepted practices. \n\n\t\t4.\tPull and tie off 5 amp (115 volt) circuit breaker for control unit power (in cockpit). \n\n\t\t5.\tMake notation in aircraft logbook regarding deactivation of the proximity floor lighting system.\n \n\tB.\tWithin 90 days after the effective date of this AD accomplish one of the following:\n \n\t\t1.\tReplace the system with another FAA-approved system; or,2.\tModify the wiring installation and accomplish the moisture proofing procedures for floor lighting assemblies in accordance with Plumly Airborne Products Service Information Letter 87-02, dated March 19, 1987. \n\n\tNOTE: Once this modification is accomplished, the floor proximity lighting system must be reactivated to comply with FAR 121.310(c)(3). \n\n\tC.\tWithin 6 months after modification in accordance with paragraph B., above, is accomplished, and thereafter at intervals not to exceed 6 months, inspect the floor-mounted light units located near the galley, lavatory, and passenger/service door exits, in accordance with Plumly Airborne Products Service Information Letter 87-02, dated March 19, 1987, to detect any corrosion of the light assemblies or blockage of the altitude pressure relief holes. Any floor- mounted units that show evidence of liquid intrusion or cracked covers must also be inspected. \n\n\t\t1.\tIf evidence of corrosion is found, clean and reseal the units in accordance with procedures described in Plumly Airborne Products Service Information Letter 87-02, dated March 19, 1987, or replace with new units.\n \n\t\t2.\tAltitude pressure relief hole areas that are found to be blocked must be cleaned.\n \n\tD.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Special Programs Branch, Aircraft Certification Division, FAA, Southwest Region. \n\n\tE.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer, may obtain copies upon request to Plumly Airborne Products, Highway 377 South, P.O. Box 26868, Fort Worth, Texas 76126-0868. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the FAA, Southwest Region, 4400 Blue Mound Road, Fort Worth, Texas. \n\n\tThis amendment 39-5617 becomes effective May 18, 1987, as to all persons, except those persons to whom it was made immediately effective by telegraphic AD T87-05-51, issued March 5, 1987.