Recommended Airborne Air Pump Replacement Schedule
Airborne urges all piston engine aircraft owners and mechanics to follow the Airframe Manufacturer's specification for pneumatic system maintenance and replacement intervals of air pumps. In the absence of the Airframe Manufacturer's specification for replacement intervals of the air pump, Airborne recommends the replacement intervals in the following table:RECOMMENDED AIRBORNE AIR PUMP REPLACEMENT SCHEDULE
| Airborne Air Pump Model No. | Recommended Replacement Interval * |
|---|---|
| Engine-Driven Air Pump: | |
| Any model no. beginning with 200 through 212 | 1,100 aircraft hrs. |
| E211CC or E212CW | 1,200 aircraft hrs. |
| Any model no. beginning with 215 through 216 | 1,200 aircraft hrs. |
| Any model no. beginning with 220 through 242 | 600 aircraft hrs. |
| Any model no. beginning with 420 through 442 | 450 aircraft hrs. |
| 832CW or 842CW | 300 aircraft hrs. |
| Auxiliary Clutch Air Pump: | |
| Any model no. beginning with 28C214 or 28C444 | 500 aircraft hrs. |
| Auxiliary Motor-Driven Air Pump: | |
| Any model no. beginning with 4A2 or 4A3 | 500 pump hrs. or 10 years of service, whichever comes first |
* To be used in the absence of Airframe Manufacturer specified replacement interval.
These recommended
replacement intervals do not take into account the shortening
of pump life caused by improper maintenance, improper regulator
settings, higher than optimal pump loads, speeds and temperatures,
oil contamination, dirty filters, etc. The pump should not be
operated beyond the Airframe Manufacturer's specification for
replacement or Airborne's recommended replacement interval, whichever
comes first.
In no event, however, should an Airframe Manufacturer's specification
for replacement interval or Airborne's recommended replacement
interval be considered an alternative to either a back-up pneumatic
power source for the air driven gyros, or a back-up electric
attitude gyro instrument. Air pump or pneumatic system failures
can and do occur without warning, sometimes with fewer hours
of service than those specified in replacement schedules. A
BACK-UP PNEUMATIC POWER SOURCE FOR THE AIR DRIVEN GYROS, OR A
BACK-UP ELECTRIC ATTITUDE GYRO INSTRUMENT, MUST BE INSTALLED
IN ALL AIRCRAFT WHICH FLY IFR.
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