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MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a

Moravan Z-142 · Service Bulletins

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Overview

This document is a mandatory service bulletin for the Moravan Z-142 and Z-43 aircraft, detailing necessary modifications to the Pitot-static system. It addresses potential issues with speed measurement due to hose deformation and outlines corrective actions to be taken during inspections.

  • Applies to Z-142 and Z-43 aircraft with specific serial numbers.
  • Focuses on the Pitot-static system's hose replacement.
  • Modifications are required to prevent speed measurement malfunctions.
  • Compliance is due at the next 100-hour or annual inspection.
  • Necessary materials will be supplied by the manufacturer free of charge.
  • Procedure includes specific steps for modifying the Pitot-static probe.
  • Leakage checks of the Pitot-static system are required post-modification.
  • Distance spiral L 242.8251-00.14 is the necessary material for the correction.

Document

Source

Originally published by zlinaircraft.eu. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

View original at zlinaircraft.eu

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Document details

Type
·
Service Bulletins
Year
·
1998
File size
·
705 KB
Publisher
·
zlinaircraft.eu
Language
·
en
About this document
What is the MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a?

The MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a is a service bulletins for the Moravan Z-142, dated 1998.

Where does the MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a come from?

This copy of the MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a was originally published by zlinaircraft.eu and is hosted on Sprinkle as a free, searchable reference copy.

What year was the MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a published?

The MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a — the Moravan Z-142 service bulletins on file — is dated 1998.

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In this document

Models Affected

The bulletin affects specific Z-142 and Z-43 aircraft with designated serial numbers.

Subject

Addresses the possibility of passage loss in the Pitot-static system due to hose deformation.

Correction

Modifications to the Pitot-static system are required to ensure proper function.

Time of Compliance

Modifications must be completed during the next 100-hour or annual inspection.

Procedure

Detailed steps for modifying the Pitot-static probe and checking for leaks.

Necessary Material

Distance spiral L 242.8251-00.14 is required for the modification.

Safety notes

  • Excessive deformation of the hose can lead to malfunction of the speed measuring system.
  • Modifications must be performed by the operator.
  • Leakage checks are essential after modifications.

Full document text

MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a Engineering Aspects are Czech CAA Approved 1. DATE: May 31, 1998 2. MODELS AFFECTED: The following Z 142 and Z 43 aircraft, where the hoses in the Pitot-static system have been replaced by manufacturer with silicon hoses 5x2 068.9 ČSN 34 6554. Z 142 aircraft S/N 0229, 0262, 0266, 0286, 0327, 0334, 0341, 0357, 0358, 0363, 0371, 0379, 0384, 0401, 0408, 0417 a 0467. Z 43 aircraft S/N 0007, 0024, 0031, 0044, 0073 a 0081 3. SUBJECT: Possibility of passage loss through the hose connected to the Pitot-static probe caused by excessive deformation of this hose and resulting in the malfunction of the speed measuring system. 4. CORRECTION: Modifying Pitot-static system of the aircraft. 5. TIME OF COMPLIANCE: At the next 100-hour or annual inspection of the aircraft. 6. CORRECTION PERFORMED The Operator. AND EXPENSES COVERED For the aircraft where the hoses were replaced by the BY: Manufacturer, the necessary material will be supplied by the Manufacturer free of charge in the appendix of this bulletin. 7. PROCEDURE: 1. Unscrew the three bolts fastening the Pitot-static probe, slip the probe out of the holder (at the same time loosen the inlet hoses from the other side of the holder). 2. Slip the inlet hoses of Pitot and static pressure out of the teflon reducing parts. Insert the distance spirals L 242.8251-00.14 (pos. 1) inside both the hoses. The hoses connect back to the teflon distance pieces struck on the probe. 3. Slide the Pitot-static probe back into the holder carefully pulling the inlet hoses step by step from the other end of the holder at the same time. Screw the three bolts fastening the Pitot-static probe. 4. Check the leakage of the Pitot-static system. Page 1 of 2 MANDATORY SERVICE BULLETIN Z 142/40a, Z 43/39a 8. NECESSARY MATERIAL: Distance spiral L 242.8251-00.14. 9. ENCLOSURE: Necessary material in accordance with the paragraphs 6 and 8 of this bulletin. .................................... Radek Sejbal Chief Designer CONTACT ADDRESS: MORAVAN, Inc. ZLIN Service 765 81 Otrokovice Czech Republic Page 2 of 2

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