The New Piper Aircraft. Inc.

1039 BULLETIN

2926 Piper Drive ’ Vero Beach, Florida, U.S.A. 32960

PIPER CONSIDERS 1

SUBJECT:

Date: F 14, 2000

Modification of Manifold Pressure Gauge (MAP) Wiring

MODELS AFFECTED: SERIAL NUMBERS AFFECTED:

PA-32R-301 Saratoga II HP 3246018 through 3246152 PA-32R-301T Saratoga II TC 3257001 through 3257115 PA-34-220T Seneca V 3449001 through 3449143

COMPLIANCE TIME: To coincide with the next regularly scheduled maintenance event inspection, but not to exceed the next one hundred (100) hours time in service.

APPROVAL: The technical contents of this Service Bulletin have been approved by the Federal Aviation Administration (F.A.A.).

PURPOSE: Field reports indicate that a condition may develop in the Manifold Pressure Gauge where the readings may become erratic or stick at around 20 inches of mercury. This condition may occur sporadically and reports indicate that cycling the electrical system off and on may temporarily correct the condition. To remedy this condition, Piper has removed the MAP harness shield ground connection at the gauge. Left uncorrected, the ability to provide proper MAP settings may be lost which may result in damage to the engine or in unknown power output.

This Service Bulletin requires the modification of the MAP wiring harness which, when accomplished, will preclude future occurrences as described above.

INSTRUCTIONS:

1. Remove external power sources if installed, assure the battery master switch is off, and disengage the circuit breakers for the DDMP and the MAP systems.

2 Gain access to the Manifold Pressure (MAP) analog gauge connector(s) by removing the gauge and/or the DDMP digital display unit. Note: Seneca V has two MAP harnesses to modify. (See Fig. 1.)

3. Carefully pull the MAP harness out far enough to access the back of the connector.

4. Refer to Sketch A diagram and locate the wires in pins F, B and N. Follow the wire from pin B or N back along the harness until the shield ground connection is located. See Sketch B. Cut the shield ground at a convenient location. Tape the ends of the cut wires and secure the harness(s) using cable ties.

5. Re-connect the MAP gauge harness and install it back into the instrument panel. Reinstall the DDMP if removed. Engage the DDMP and MAP circuit breakers.

(OVER) ATA: 7715

PAGE 2 OF4 SERVICE BULLETIN NO. 1039

INSTRUCTIONS: (Cont’d)

6. Make preparations for a ground run. Restore electrical power and turn on the battery master. If the electronic engine instrument passes the start up self test, start the engine and perform an engine ground run. Check the MAP and DDMP functions for proper operation.

7. Make an appropriate logbook entry indicating compliance with this Service Bulletin.

MATERIAL REQUIRED: As required, insulated tape and aircraft quality cable ties. Obtain locally.

AVAILABILITY OF PARTS: Your Piper Field Service Facility.

EFFECTIVITY DATE: This Service Bulletin is effective upon receipt.

SUMMARY: Applicable Factory Participation is limited to new aircraft in warranty at the time of compliance. Factory Participation will remain in effect for a period of time not to exceed 180 days from the date of this Service Bulletin.

Please contact your factory authorized Piper Field Service Facility to make arrangements for compliance with this Service Bulletin in accordance with the compliance time indicated and to obtain additional information concerning any applicable factory participation.

NOTE: If you are no longer in possession of this aircraft, please forward this information to the present owner/operator and notify the factory of address/ownership corrections. Changes should include aircraft model, serial number, current owner’s name and address.

Corrections/Changes should be directed to:

The New Piper Aircraft, Inc. ATTN: Customer Services 2926 Piper Drive Vero Beach, FL 32960

SERVICE BULLETIN NO. 1039 PAGE 3 OF 4

Typical Instrument Panel Installation PA-32R-301(301T) Shown

Typical Engine Gauge Installation

DDMP Display.

To ease access to the MAP connector, the DDMP may be removed and the harness pulled through the opening.

The Manifold Pressure Gauge(s) (MAP) may be removed and the harness and connector(s) pulled through that opening.

Fig. 1

Manifold Pressure Gauge (MAP) connector.

The connector number for the PA- 32R-301 & 32R-301T is P314.

The connectors for the PA-34-220T are P351 (left engine) and P352 (right engine).

Locate the signal wire shield (pins B & N) and the power ground wire pin F. Follow the wires back to where the shield ground wire connection is located.

Fig. 2

PAGE4 OF4 SERVICE BULLETIN NO. 1039

Wire harness diagram shown for PA-32R-301 & PA-32R-301T and PA-34-220T.

Sketch A

The new configuration requires that the signal wire shield connection (from pins B & N) be cut and separated from the power ground wire pin F. Loose wire ends to be taped and tied up.

Existing Configuration with the signal wire shield (pins B & N) connected to the power ground wire pin F.

The connector shown is at the gauge mounted in the instrument panel.

The connector number for the PA-32R- 301 (T) is P314.

The connectors for the PA-34-220T are P351 (left engine) and P352 (right engine).

The shield ground wire may be cut at any convenient location near the gauge. Loose wire ends to be taped and tied up.

Sketch B