Hawker 800XP AIR45574 Accumulator Replacement and Effectivity

The two accumulator figures

AIR45574 and AIR45574-4 appear together in two catalog figures:

Figure and item	Catalog context	Quantity	Effectivity	Replacement wording
29-10-05-45 item 40	Accumulator support installation	2	8277-8277	AIR45574 points to AIR45574-4; AIR45574-4 incorrectly points to itself
29-20-05-20 item 74	Hydraulic and emergency-brake pipe installation	1	8266-8999	AIR45574 points to AIR45574-4; AIR45574-4 replaces AIR45574

Both figures reference CMM 29-10-1116. The matching part family and CMM do not make the quantities interchangeable between catalog assemblies.

The reliable forward spares direction

The AIR45574 base row tells the reader to order AIR45574-4 in both figures. The broader Figure 29-20-05-20 replacement row then confirms AIR45574-4 as the spares replacement for AIR45574.

That is the supported forward relationship:

AIR45574 to AIR45574-4

The reviewed export does not print a later AIR45574 dash number.

The defective self-replacement row

The AIR45574-4 row in Figure 29-10-05-45 says “spares replacement for AIR45574-4.” A part number cannot provide a meaningful replacement relationship to itself. This guide does not silently change the source text or treat it as valid.

The part identity, figure, item, quantity, serial-8277 effectivity, and CMM reference are still present. For that reason the row is retained with partially verified confidence and an explicit source-error note.

Current approved technical data must resolve the bad relationship text.

Why the quantity changes

Figure 29-10-05-45 is an accumulator support installation limited to aircraft serial 8277 and prints two units. Figure 29-20-05-20 is a different installation and prints one unit across 8266-8999.

Do not flatten those entries into “one accumulator per aircraft” or “two accumulators per aircraft.” The quantity is attached to the assembly represented by the figure.

What to put on an accumulator request

Keep the following details together:

• removed-unit part and serial number
• aircraft model and full serial number
• installed position or system role
• applicable IPC figure and item
• requested AIR45574-4 forward replacement
• offered condition and release paperwork
• CMM capability claimed by the repair source
• core number, condition, and return terms for an exchange

Do not use a marketplace listing to resolve the serial-8277 catalog conflict.

Approved-data boundary

This guide does not state accumulator charge pressure, servicing gas, inspection intervals, removal instructions, or acceptance limits. Those subjects require the current applicable maintenance and component data.