Cowling Maintenance; Engine Cowling Removal And Installation; Engine Cowling Cleaning, Inspection And Repair; Engine Cowl Flaps Operation And Adjustment - Piper PA-44-180 SEMINOLE Maintenance Manual

COWLING.
The cowling consists of an upper and lower section and a nose section. A cowl flap is an integral part of
the lower cowl.

COWLING MAINTENANCE.

REMOVAL AND INSTALLATION OF ENGINE COWLING. (Refer to Figure 71-2.)
The procedure for removing the engine cowling is the same for the engines on both the -180 and -180T.
1. Remove the fasteners securing the top cowl and remove the cowl.
2. Disconnect the cowl flap control, and on the 180T remove the sniffle valve or disconnect it from the
tubing.
3. Support the bottom cowl and remove the screws that attach the cowl to nose cowl, engine mount and
nacelle.
4. The nose cowl may be removed by removing the attaching screws and separating the two cowl halves.
5. Install the cowling in reverse of removal.
CLEANING, INSPECTION AND REPAIR OF ENGINE COWLING.
1. The cowl should be cleaned with a suitable solvent then wiped with a clean cloth.
2. Inspect the cowling for dents, cracks, loose rivets, damaged or missing fasteners and damaged fiberglass
areas.
3 . Repair all defects to prevent further damage. Fiberglass repair procedures may be accomplished according
to Fiberglass Repairs, Chapter 51.
ENGINE COWL FLAPS. (Refer to Figure 71-3.)
The cowl flaps are all metal flaps located on the rear of the bottom cowls. The flaps are manually operated
through a push-pull control from the cockpit. The cowl flaps are connected to the engine cowls with full
length piano type hinges.
OPERATION AND ADJUSTMENT OF COWL FLAPS.
The cowl flaps are all metal flaps located on the rear of the bottom cowls. The flaps are manually operated
through the push-pull controls mounted in the lower portion of the console. When the control levers are in the
up position, the flaps are closed. To operate the cowl flaps, depress the lock and move the lever down, releasing
the lock after the initial down movement will allow the lock to stop the flap travel at the intermediate position.
For full open position, depress the lock and move the control down; release the lock after the initial movement
and continue to move the control down until the lock stops the travel of the control. To raise the cowl flaps
reverse the procedure. The cowl flaps should be adjusted as follows:
1. Place the control in the up position.
2. Ascertain that the control lock is engaged.
3. Check the cowl flap to visually determine that the flap is flush with the bottom of the engine cowl.
4. If the flap is not flush, disconnect the push-pull control from the arm on the inboard side of the flap.
5. Loosen the jam nut on the clevis end and adjust the clevis to get a flush fit between the cowl flap and
engine cowl.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3E12
71-12-01
Page 71-14
Revised: May 15, 1989