Model 8400 brake booster assemblies and modification of Scott Aviation Model B-711 Brake Master Cylinders
Piper PA-18 Super Cub · Supplemental Type Certificate
Overview
This document provides installation instructions for the Model 8400 brake booster assemblies and modifications to Scott Aviation Model B-711 Brake Master Cylinders. It is intended for use by technicians and pilots involved in the maintenance and modification of various Piper aircraft models, specifically those listed under the Supplemental Type Certificate (STC) No. SA2318NM. The document outlines necessary procedures for installation, including compliance with FAA regulations and the required documentation to be completed post-installation. It emphasizes the importance of using FAA-approved components and provides specific hydraulic pressure requirements for the brake systems involved.
- The installation of the brake booster requires FAA-approved high-pressure brake lines capable of withstanding 2547 PSI.
- The wheel/brake assembly must be approved for a maximum hydraulic pressure of at least 1698 PSI.
- FAA Form 337 must be completed after installation, detailing the work done and referencing the correct STC number.
- The document applies to multiple Piper models, including various PA-18 configurations and others listed under the STC.
- The latest revision of the document is dated March 13, 2008.
Document
Source
Originally published by documents.alaskagearcompany.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Supplemental Type Certificate
- Year
- 2008
- Pages
- 5
- File size
- 1.0 MB
- Publisher
- documents.alaskagearcompany.com
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In this document
Installation Requirements
To install the brake booster, the aircraft must be equipped with FAA-approved high-pressure brake lines. These lines must be compatible with MIL-H-5606BB hydraulic fluid and capable of withstanding an ultimate hydraulic pressure of 2547 PSI for at least 3 seconds without failure. Additionally, the wheel/brake assembly must be FAA-approved for a maximum hydraulic pressure of at least 1698 PSI.
Documentation and Logbook Entries
After installation, it is mandatory to fill out FAA Form 337, documenting the major repair and alteration. The logbook entry must include a specific notation regarding the installation of the Northern Piper Aviation brake booster, referencing the appropriate drawing and STC number.
Supplemental Type Certificate Information
The document lists the specific Piper aircraft models eligible for the brake booster installation under STC No. SA2318NM, including various configurations of the PA-18, PA-12, PA-14, J5C, J3C, and PA-22 series.
Safety notes
- Ensure all components used in the installation are FAA-approved to avoid safety risks.
- Failure to comply with the specified hydraulic pressure requirements may lead to brake system failure.
Full document text
“North River Aviation” Model 8400 brake booster assemblies and modification of Scott Aviation Model B- 711 Brake Master Cylinders Installation Instructions Addendum to Installation Instructions on Drawing No 8400 A1. After completing the installation of the brake booster, it is necessary to fill out FAA-Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance), in addition to making the logbook entry specified in Instruction 4 on Page 2 of Drawing No. 8400. Make the following notation in Item 8 of the Form 337 (Description of Work Accomplished) : “Installed Northern Piper Aviation brake booster in accordance with Northern Airframes Drawing No. 8400 and STC No. _________. Weight change is negligible.” A2. To be eligible for installation of the brake booster, the airplane must be equipped with FAA approved high-pressure brake lines. “FAA approved high-pressure brake lines” are brake lines which the FAA has found to be sufficiently flexible for their intended purpose, compatible with MIL-H-5606BB (red) hydraulic fluid, and capable of sustaining an ultimate hydraulic pressure of 2547 PSA for at least 3 seconds without failure or leakage; and which the FAA has approved for installation on the airplane. Any wheel/brake assembly installed on an airplane equipped with the brake booster must have a brake FAA approved for a maximum available hydraulic pressure of at least 1698 PSI as defined by the brake’s original certification basis (TSO-c26, TSO-C26a, TSO-C26b, or TSO-C26c; or the airplane’s certification basis if the brakes were approved as part of the airplane type design). A3. The STC Number to be entered in the airplane logbook and in Item 8 of the FAA form 337 must be the correct one for the make and model of airplane modified, as shown on the following list: Airplane Make and Model Supplemental Type Certificate No. Piper PA-18, PA-18A, PA-18 “125” (Army L-21A), PA-18 “135” (Army L-21B), PA-18A “135”, PA-19 (Army L-18C), PA-18 “150”, and PA-18A “150” SA2318NM Piper PA-12 SA3633NM Piper PA-14 SA3634NM Piper J5C SA3635NM Piper J3C-40, J3C-50, J3C-65 (Army L-4, L-4B, L4H, L-4J; Navy NE-1, NE-2) and PA-11 SA4629NM Piper PA-22 “150”, PA-22 “160”, PA-22 “108” SA4653NM Drawing No. 8400A Date 8-13-85 Revision B Rev Date: 6-29-90 Revision C Rev Date: 11-19-91 Revision C Rev Date: 8-1-04 Revision E Rev Date: 3-13-08