Service Bulletin No. 547
Piper PA-23 Aztec · Service Bulletins
Overview
This document is a service bulletin from Piper Aircraft Corporation regarding the inspection of the stabilator tip rib on specific models of the PA-23 Aztec. It outlines the affected serial numbers, compliance requirements, and inspection instructions to ensure the correct attachment hardware is installed.
- Service Bulletin No. 547 issued on March 1, 1977.
- Affects PA-23-250 Aztec models with specific serial numbers.
- Inspection required within the next 50 hours of operation.
- Missing rivets or screws could lead to cracking in the stabilator tip rib area.
- Instructions for inspection and hardware installation are provided.
- Reimbursement for modification material and labor is available.
- Contact Piper Field Service Facility for compliance arrangements.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at regulations.gov. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 1977
- File size ·
- 171 KB
- Copy found at ·
- regulations.gov
- Language ·
- en
What is the Service Bulletin No. 547?
The Service Bulletin No. 547 is a service bulletins for the Piper PA-23 Aztec, dated 1977.
What year was the Service Bulletin No. 547 published?
The Service Bulletin No. 547 — the Piper PA-23 Aztec service bulletins on file — is dated 1977.
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In this document
Models Affected
PA-23-250 Aztec 'F' models with serial numbers 27-7654001 to 27-7754054.
Compliance Time
Inspection must be completed within the next fifty (50) hours of operation.
Purpose
To inspect for missing stabilator tip rib rivets and attachment screws to prevent potential cracking.
Instructions
Detailed steps for inspecting and installing necessary hardware on the stabilator tip rib.
Material Required
Refer to the attached sketch/instruction sheet for required materials.
Availability of Parts
Parts can be obtained from your Piper Field Service Facility.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Inattention to this matter could lead to cracking in the stabilator tip rib area.
- Ensure all hardware is properly installed to avoid potential failures.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
Piper Aircraft Corporat ion Lock Haven, Pennsylvania, U.S.A. “Modification DOA EA- 1 Approved’ March 1, 1977 Subiect: Models Affected: Inspection of Stabilator Tip Rib Serial Numbers Affected: PA-23-250 (6 Place) Aztec “F”. . , . . . . . . . . . 27-7654001 to 27-7754054 Inclusive (see NOTE, below) NOTE: Above referenced aircraft serial numbers 27-7654001 to 27-7754041 Inclusive are affected only if either or both stabilators have been replaced with any of the following listed stabilators (issued from factory service stock): 1Stabilator Assy. - T 1 t Stabilator Assv. - 1 Part No. 1 15658 Left -26 Right -27 Serial Number* 27-0272 11 -27 27-0275 II -26 27-0281 11 -26 *The same stabilator serial numbers applies to both -26 (left) and -27 (right) stabilators fabricated as “matched pairs”; units fabri- cated individually bear an individual serial number. over Service Bulletin No. 547 (Continued) Page 2 Compliance Time: Within the next fifty (50) hours of operation Purpose: Resulting from the inspection specified in Piper Service Bulletin No. 540 dated January 4, 1977, it was found that certain stabilator tip rib rivets and/or the stabilator tip tube and weight assembly attachment screw may be missing. Although no failures have been reported as a result of this condition, inattention to this matter could lead to cracking in the stabilator tip rib area. This Service Bulletin provides instructions to inspect the stabilator tip rib area to determine that the correct attachment hardware is installed and specifies proper hardware to be installed, if necessary (refer to attached sketch/instruction sheet for an illustrated view of this area). Instructions: Refer to attached sketch/instruction sheet for inspection instructions and hardware installation details. Material Required: Reference attached sketch/instruction sheet. Availability of Parts: Your Piper Field Service Facility. Effectivity Date: This Service Bulletin is effective upon receipt. Summary: Please contact your Piper Field Service Facility to make arrangements for compliance with this Service Release in accordance with the provisions of Compliance Time, above. Reimbursement for modification material and labor (one hour) allowance credit-- if required--is available through your Piper Field Service Facility in accordance with their respective material/labor allowance credit application procedure. - 1.33- -2.62--l. 1.30 1.00 .75 Rivet NAS1738B4-3 (4 Req. ) Existing Rivets Tube & Weight Assembly Screw (MS35207-268) Rivet NAS1738B4-1 (7 Req. ) END VIEW OF STABILATOR TIP RIB (Left Shown - Right Opposite) INSTRUCTIONS 1. Remove tip assembly from left and right stabilators. 2. Inspect forward end of stabilator ribs to determine if five rivets are installed aft of the tube & weight assembly attachment plate, two rivets installed forward of the attachment plate and a screw installed thru the square tube welded to the attachment plate. 3. If screw and rivets are present on both stabilators, reinstall tip assemblies and make proper logbook entry of Service Bulletin 547 inspection compliance. 4. If screw and rivets are missing from either stabilator, install new hardware as follows: a. Install MS35207-268 screw (P/N 411 537) thru the square tube and,into the anchor nut as shown. b. Locate and drill eleven . 144 holes as shown above, C. Install four NAS1738B4-3 blind rivets (P/N 522 883) at the attachment plate and seven NAS1738B4-1 blind rivets (P/N 522 881) aft and forward of the attachment plate. d. Reinstall tip assembly and make proper logbook entry of stabilator rivet and screw installation per Service Bulletin 547. S.B. #547