SERVICE BULLETIN NO. 811A

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Piper Aircraft Corporation Vero Beach, Florida, U.S.A. SERVICE No811A BULLETIN PIPER CONSIDERS COMPLIANCE MANDATORY FAA Approved Date May 12, 1986 S/M (Service Bulletin No. 811A supersedes and voids Service Bulletin No. 698A, dated August 17, 1982 and Service Bulletin No. 811, dated January 8, 1986) This Service Bulletin is divided into Two (2) PARTS. Refer to each PART for specific Purpose, Instructions and Material Required. SUBJECT: REASONFOR REVISION: Ammeter Replacement Add Additional Models Affected, Add Serial Numbers Affected, Add PART II, Revise Summary, and Revise Instructions in PART I. MODELSAFFECTED: SERIAL NUMBERSAFFECTED: PA-28-150/160 Cherokee PA-28-180 Archer PA-28-181 Archer II 28-3378 through 28-4377 28-3378 through 28-7505259 and 28-El3 28-7690001 through 28-8190279, 28-8290017, 28-8290018, 28-8290028, 28-8290033, 28-8290034 and 28-8290036 28-10720 through 28-7710089 and 28-E11 28-7911001 through 28-8511020 28-7921001 through 28-7921091 28R-30004 through 28R-30481, 28R-30483 through 28R-7130013 28R-30482, 281-35001 through 28R-7635545 28R-7737001 through 28R-7837317 28R-7703001 through 28R-7803373 28R-7918001 through 28R-8218026 28R-7931001 through 28R-8631006 32-1 through 32-7800008 32-40000 through 32-7940290 32R-7680001 through 32R-7880068 32R-7885001 through 32R-7985105 32R-7787001 through 32R-7987126 32-8006001 through 32-8106087 32-8024001 through 32-8124030 32R-8013001 through 32R-8113094 32R-8029001 through 32R-8129090 34-7570001 through-34-8170092 (over) ATA: 2430 PA-28-235 Cherokee PA-280236 Dakota PA-28-201T Turbo Dakota PA-28R-180 Arrow I PA-28R-200 Arrow II PA-28R-201 Arrow I I I PA-28R-201T Turbo Arrow III PA-28RT-201 Arrow IV PA-28RT-201T Turbo Arrow IV PA-32-260 Cherokee PA-32-300 Cherokee Six PA-32R-300 Lance PA-32RT-300 Lance II PA-32RT-300T Turbo Lance II PA-32-301 Saratoga PA-32-301T Turbo Saratoga PA-32R-301 Saratoga SP PA-32R-301T Turbo Saratoga SP PA-34-200T Seneca I I SERVICE BULLETIN 811A PAGE 2 OF 4 PART I COMPLIANCETIME: Within the next ten (10) hours of operation or to coincide with the next regularly scheduled inspection event, whichever occurs first. PURPOSE: Reports have been received of loose and/or shorting ammeter connections at the ammeter cluster gauge. If this condition exists and is left uncorrected, damage could occur to the ammeter, its wiring and the cluster, with the possibility of electrical failure and/or fire within the cockpit. This Service Bulletin announces the availability of a shunted ammeter kit which, when installed, will eliminate full electrical power passing through 'the ammeter gauge. The use of a remote electrical shunt in the ammeter installation will eliminate the possibility of electrical failure and/or fire associated with a shorted ammeter. NOTE: Service Bulletin No. 811A does not apply to aircraft equipped with ninety (90) ampere alternators. INSTRUCTIONS: All instructions necessary to accomplish this modification are contained in the Ammeter Replacement Kit, Piper Part Number 765-186. NOTE: Upon completion of installation of ammeter in cluster housing, check ammeter studs with ohmeter to insure they are not grounded to the cluster housing. MATERIAL REQUIRED: One (1) each Ammeter Replacement Kit, Piper Part Number 765-186, per each single engine aircraft. Two (2) each Ammeter Replacement Kit, Piper Part Number 765-186, per each PA-34 Model Aircraft. AVAILABILITY OF PARTS: EFFECTIVITY DATE: Your Piper Field Service Facility. This Service Bulletin is effective upon receipt. SUMMARY: Please contact your Piper Field Service Facility to make arrangements for compliance with the provisions of this Service Bulletin in accordance with the compliance time indicated. Credit is available for material only on all affected aircraft when compliance is accomplished at an authorized Piper Field Service Facility. For aircraft in warranty only, credit is available for material and for up to two (2.0) hours labor on single engine aircraft and for up to four (4.0) hours labor on multi-engine aircraft when compliance is accomplished at an authorized Piper Field Service Facility. SERVICE BULLETIN NO. 811A PAGE 3 OF 4 ---------------------------------------------------------------------------------- PART II COMPLIANCETIME: Within the next ten (10) hours of operation or to coincide with the next regularly scheduled inspection event, whichever occurs first. PURPOSE: Engineering tests have determined that a number of ammeter gauges shipped in support of Service Bulletin No. 811 were not correctly calibrated. Correctly calibrated gauges may be identified by the presence of a white dot located on the righthand side of the ammeter face, immediately following the word "AMPS". See Sketch "A" attached. Incorrect ammeter indications could lead to inadvertent overcharging and/or depletion of the aircraft's battery with subsequent loss of battery electrical power. I INSTRUCTIONS: 1. All aircraft which have complied with Service Bulletin No. 811 must inspect for the presence of a white dot on the righthand side of the ammeter face. See Sketch "A" attached. 2. If white dot is not present, the ammeter gauge, only, must be replaced with a correctly calibrated gauge. 3. Using applicable instructions for the Ammeter Replacement Kit, Piper Part Numb& 765-186, replace the newly installed ammeter only, with Ammeter, Piper Part Number 763-053. NOTE: Upon completion of installation of ammeter in cluster housing, and prior to attaching the wires, check ammeter studs with ohmeter to insure they are not grounded to the cluster housing. 4. Run engine and check out system. 5. Make appropriate logbook entry of compliance with this Service Bulletin. MATERIAL REQUIRED: If required by inspection, one (1) each Ammeter Gauge, Piper Part Number 763-053, per affected aircraft. I AVAILABILITY OF PARTS: Your Piper Field Service Facility. EFFECTIVITY DATE: This Service Bulletin is effective upon receipt.