Removal And Replacement Of Cluster Mounted Instruments; Rate Of Climb Indicator; Troubleshooting (Rate Of Climb Indicator) - Piper Dakota Maintenance Manual

REMOVAL AND REPLACEMENT OF CLUSTER MOUNTED INSTRUMENTS

A cluster, located on the instrument panel, contains five individual instruments. Remove these instruments
as follows:
1. Remove face panel by pulling panel free from retainers.
2. With face panel removed, clear plastic cover on cluster assembly is exposed. Remove cover and
cluster by removing two mounting screws.
3. Remove connection to individual instrument to be removed and remove instrument from cluster
assembly.
4. Replace instruments as follows:
a. Place instrument in position.
b. Attach all connections to instrument and place in cluster.
c. Secure cover and cluster with two screws.
d. Place face panel in position with retainers.

RATE OF CLIMB INDICATOR

The rate of climb indicator measures rate of change in static pressure when airplane is climbing or
descending. Due to instrument lag, the aircraft will be climbing or descending before the instrument starts to
read and the instrument will continue to read after the aircraft has assumed level flight. In rough air, this should
not be considered a malfunction. Approximately a 6 second lag is built into the instrument.
CHART 3401. TROUBLESHOOTING (RATE OF CLIMB INDICATOR)
Trouble
Pointer not set on zero.
Pointer fails to respond.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
—CAUTION—
Check all mountings and connections for security.
Cause
Aging of diaphragm.
Obstruction in static line.
Pitot head frozen over.
Water in static line.
Obstruction in pitot head.
2D12
Remedy
Reset pointer to zero
with setting screw. Tap
instrument while resetting.
Disconnect all instruments
connected to the static line.
Clear line.
Check individual instru-
ments for obstruction in
lines.
Clean lines and head.
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Page34 - 04
Reissued: August 1, 1986