Instruction Sheet

Beechcraft 77 Skipper · Maintenance Manual

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Overview

This document provides maintenance instructions for the Beechcraft 77 Skipper's air filter system, specifically detailing the assembly and replacement of the polyurethane air filter element. It includes installation steps, servicing guidelines, and inspection requirements to ensure continued airworthiness.

The air filter element is approximately 98% efficient.
Replace the filter element every 100 hours or 12 months.
Do not wash and reuse the filter element.
Inspect the carburetor heat box for wear before installation.
Fill out FAA Form 337 after initial installation.
Check the filter assembly for damage or contamination before flights.
Use specific adhesives for gasket installation.
Ensure the gasket is compressed 50% for optimal sealing.

Document

Source

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

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Document details

Type: Maintenance Manual
Year: 2004
File size: 644 KB
Publisher: aircraftspruce.com
Language: en

Specifications & performance

Extracted from this document.

Specifications

Part number: BA-2010
Filter element part number: BA-6108

About this document

What is the Instruction Sheet?

The Instruction Sheet is a maintenance manual for the Beechcraft 77 Skipper, dated 2004.

Where does the Instruction Sheet come from?

This copy of the Instruction Sheet was originally published by aircraftspruce.com and is hosted on Sprinkle as a free, searchable reference copy.

What year was the Instruction Sheet published?

The Instruction Sheet — the Beechcraft 77 Skipper maintenance manual on file — is dated 2004.

Documentation completeness

4/7

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In this document

Installation Instructions

Step-by-step guide for removing the old filter, inspecting the heat box, and installing the new filter element.

Servicing

Guidelines for replacing the filter element under normal and severe conditions.

Continued Airworthiness Inspection Requirements

Inspection intervals and procedures for pre-flight checks and element replacements.

Inspection Procedures

Detailed procedures for checking the filter assembly and intake system for security and damage.

Adhesive Instructions

Instructions for applying adhesive to the gasket and frame for proper installation.

Safety notes

Do not wash and reuse the filter element.
Inspect the heat box for wear; repair or replace if un-airworthy.
Check for security and damage before flight.
If a fire was present, inspect the foam element for erosion.
Ensure the gasket makes 100% contact and is compressed 50%.

Full document text

BRACKETT AERO FILTERS, INC. Instruction Sheet Part No. 2004 Date Rev: 06-19-04 Mfg. by: BRACKETT AERO FILTERS, INC. Kingman, AZ INSTRUCTIONS ASSEMBLY PART NO. BA-2010 APPROVED ON AIRCRAFT MODELS: Beech 77 "Skipper" Replaces P/N P13-3881 FAA APPROVAL DATA: STC-SA71GL LIST NO. 1 FAA-PMA SUPPLEMENT NO. 1 Your new polyurethane air filter element has been designed to provide maximum dust collecting efficiency, non-restrictive air flow, and economical element replacement, while maintaining a lightweight filter. The element has been treated with a distinctive treatment called a wetted agent and is approximately 98% efficient. The wetted agent is an accompaniment in the efficient capturing of dust. In addition, the element has received a fire retardant treatment. For the above reasons, replace the element each 100 hours of use, 12 months or when 50% covered with foreign material. DO NOT WASH AND REUSE. INSTALLATION INSTRUCTIONS Step 1. Remove existing filter and gasket from carburetor heat box and discard. Step 2. Inspect heat box for condition making sure valve shaft and bushing is not worn. If un-airworthy, repair with kit or replace worn carburetor heat box. Step 3. Bolt filter in place with the one top bolt. Mark the two bottom hole locations and carefully drill .196 diameter holes, be sure and capture the chips. Step 4. Attach filter frame to carburetor heat box with screws, nuts and washers, one on each side (furnished). Torque each nut to where the neoprene gasket is compressed to ½ of its original thickness. Step 5. Install filter element PN BA-6108 into frame, making sure the taper of element is the same as the taper of the frame and contact is being made on all sides. Step 6. Install grill with the 2 legs under the frame and the cross bars facing out. Align the piano hinges and insert safety pin making sure it is in the locked position. Step 7. Re-install cover plate on the cowl. Step 8. NOTE: After initial installation of filter assembly, fill out FAA Form 337 for return to service. On future replacement of parts this form will not be required. SERVICING: Under normal conditions, replace filter element, PN BA-6108, after 100 hours use or 1 year intervals. Under severely dusty conditions, check daily and replace when element is 50% covered with foreign material. For Continued Airworthiness Instructions, see Form I-194. BRACKETT AIR FILTER DOCUMENT I-194 PLACE IN AIRCRAFT RECORDS CONTINUED AIRWORTHINESS INSPECTION REQUIREMENTS AS PER FAR 23.1529 AND GENERAL PROCEDURES OF PART 43 INSPECTION INTERVALS: Pre-flight inspections, engine backfire inspection, 100 hour inspections, annual inspections, filter element replacements. INSPECTION PROCEDURES A. Pre-flight inspection: Per Pilots Operating Handbook, check filter assembly for security, damage or 50% contamination of element face. If found report to maintenance personnel prior to flight. B. Engine start-up backfire inspection: Prior to flight, check the entire intake system for security or damage. If a fire was present, the downstream face of the foam element will show erosion. If any irregularities are found see Chart I and also refer to the Aircraft Maintenance Manual for the intake system. C. At element replacement intervals: With the element removed, inspect the filter grill, filter frame, filter mountings and entire intake system for security, wear and any deformation. Note: On filter assemblies with gaskets, visually inspect inside and outside of frame for any signs of gasket looseness, movement or deterioration. If found refer to Chart I or the proper maintenance manual for your aircraft or component. PART INSTRUCTIONS FRAME X COMPLETE NEW ASSEMBLY GASKET X GRILL X REPLACE WITH NEW GRILL HARDWARE X REPLACE UNSERVICEABLE WITH NEW SCREEN X COMPLETE NEW ASSEMBLY SCREEN/GASKET X COMPLETE NEW ASSEMBLY ( ) ELEMENT X REPLACE ELEMENT ON FILTER FRAME, REMOVE OLD NEOPRENE GASKET AND ALL TRACES OF ADHESIVE DOWN TO A CLEAN ANODIZED FRAME SURFACE. USE ADHESIVE 3M#847 OR DOW CORNING RTV-732. COAT ENTIRE MATING SURFACE (GASKET TO FRAME). APPLY ADHESIVE FOLLOWING MANUFACTURER’S LABEL DIRECTIONS. WHEN FRAME AND GASKET ARE PLACED TOGETHER, CLAMP OR WEIGHT DOWN AT .75 LB./SQ. IN. OF CONTACT AREA. ALLOW TO CURE 24 HOURS PRIOR TO INSTALLATION. PRIOR TO REINSTALLATION OF FILTER, CHECK AIRBOX MATING SURFACE FOR IRREGULARITIES. IF FOUND, CORRECT PER MANUFACTURER’S REQUIREMENTS. UPON REINSTALLATION CHECK THAT THE GASKET MAKES 100% CONTACT. THE GASKET SHOULD BE COMPRESSED 50% FOR OPTIMUM SEAL. REPLACE REWORK ASSEMBLIES USING SCREEN GASKETS PRE 1981; BA–4106, BA–5110 AND BA–8110. DATE: 3-16-94 CHART 1

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