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Print Date: Sat Mar 28 14:00:28 CST 2015 MODEL 172 MAINTENANCE MANUAL (Rev 20

6-20-02 (Rev 15)

2015 Cessna Aircraft CompanyRetain printed data for historical reference only. For future maintenance, use only current data. Page 1

ACCESS/INSPECTION PLATES- DESCRIPTION AND OPERATION

1. General

A. There are access and inspection panels on the interior and exterior of the airplane. These panelsgive access to components and airframe areas.

NOTE: Panels that have hinges attached to them (like the oil door for example) are not referred

to as panels and are not included in this section.

B. This section can be used in conjunction with inspection practices (Chapter 5) or standardmaintenance practices to quickly find related components throughout the airplane.

2. Access/Inspection Panel Numbering

A. All access/inspection panels have a series of numbers and letters which identify their zone location,sequence, and orientation.(1) Zone Location - Zone location is identified by the first three numbers of any panels. This

three-number sequence is specified in Airplane Zoning - Description and Operation.(2) Sequence - The sequence is identified by alphabetical letters follow the three-number

sequence. The first panel is identified as A, the second panel is identified as B, and so on.(3) Orientation - The orientation for each panel is identified by one of four letters that come after

the sequence letter. The orientation letters are "T" for top, "B" for bottom, "L" for left, and "R"for right.

B. With access panel 510AB as an example, the breakdown is as follows:(1) Zone Location = 510 (inboard portion of left wing)

(2) Sequence = A (the first panel within the zone)

(3) Orientation = B (located on the bottom of the zone).

3. Description

A. Access/Inspection Panels.

Table 1. Cabin Floorboard Panels

Panel Equipment Located In Area (Refer to Figure 1)

230AT Brake Line

230BT Fuel Pump and Reservoir

230CT Fuel Pump and Reservoir

230DT Fuel Lines, Wire Bundle

230ET Elevator Bellcrank, Fuel Lines

230FT Fuel Selector, Elevator Bellcrank

230GT Fuel Line

230HT Fuel Line

230JT Fuel Lines, Wire Bundles

230KT Elevator Trim Tab Pulley, ADF Antenna

230LT Fuel Lines

230MT Fuel Lines

230NT Fuel Lines

230PT Wire Bundle, Brake Line

230QT Rudder Cables, Elevator Cables, Elevator Trim Cables

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230RT Brake Line

231AT Main Landing Gear Bulkhead

231BT Rudder Cables, Elevator Cables, Elevator Trim Cables

231CT Main Landing Gear Bulkhead

231DT Rudder Cables, Elevator Cables, Elevator Trim Cables

231ET Rudder Cables, Elevator Cables, Elevator Trim Cables

231FT Transponder Antenna

231GT Rudder Cables, Elevator Cables, Elevator Trim Cables

231HT Structure

231JT Rudder Cables, Elevator Cables, Elevator Trim Cables

231KT Structure

Table 2. Fuselage Panels


120AT External Power

210AB Control Yoke/Elevator Attach

210BB Brake Line, Rudder Cables, Elevator Cables, Elevator Trim Cables, Wiring

210CB Rudder Cables, Elevator Cables, Elevator Trim Cables

310AL Elevator Pulleys, Elevator Trim Pulleys

310AR Elevator Pulleys, Elevator Trim Pulleys

310BR Rudder Cables, Elevator Cables, Elevator Trim Cables

320AB Elevator Trim Actuator

Table 3. Wing Access Panels


610AB Wiring

610BB Wiring

610CB Strut Bolt

610DB Fuel Lines, Fuel Transmitter

610EB Flap Controls

610FB Strut Bolt

610GB Flap Actuator

610HB Fuel Lines, Fuel Transmitter

610JB Wing Structure

610KB Wing Structure

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610LB Flap Cables, Aileron Cables

610MB Flap Cables, Aileron Cables

610NB Aileron Cables

620AB Autopilot Roll Servo

620BB Aileron Cables, Trim Cables

620CB Aileron Cables

620DB Aileron Bellcrank

620EB Wing Structure

620FB Wing Structure

620GB Wing Structure

620HB Wing Structure

620JB Wing Structure

510AB Wiring

510BB Wiring, Pitot Tube

510CB Strut Bolt

510DB Fuel Lines, Fuel Transmitter

510EB Flap Controls

510FB Strut Bolt

510GB Flap Actuator

510HB Fuel Lines, Fuel Transmitter

510JB Wing Structure, Courtesy Light

510KB Wing Structure, Flap Bellcrank

510LB Flap Cables, Aileron Cables

510MB Flap Cables, Aileron Cables

510NB Aileron Cables

520AB Aileron Cables, Trim Cables

520BB Aileron Cables, Aileron Bellcrank

520CB Wing Structure

520DB Wing Structure

520EB Wing Structure

520FB Wing Structure

520GB Wing Structure

520HB Magnetometer

610AT Fuel Bay

610BT Fuel Bay

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610CT Fuel Bay

510AT Fuel Bay

510BT Fuel Bay

510CT Fuel Bay

Table 4. Flap Panels


511AT Flap Access

511BT Flap Access

511CT Flap Access

511DT Flap Access

611AT Flap Access

611BT Flap Access

611CT Flap Access

611DT Flap Access

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Figure 1. Cabin Floorboard Panels

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Figure 2. Fuselage Panels

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Figure 3. Wing Access Panels

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Figure 4. Flap Panels

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