HawkerAircraft Parts

Verified IPC identity record

AC61518

Hydraulic and brake reducing valve

Direct answer

AC61518 is a reducing valve repeated in the Hawker hydraulic and wheel-brake catalog. It appears at ATA 29 Figure 29-10-05-50 item 530, ATA 32 Figure 32-40-10-10 item 165, and ATA 32 Figure 32-40-20-10 item 10. Each reviewed row prints quantity 1 and effectivity 8266-8999. The ATA 29 row calls it Mark 3, and the valve-and-mounting rows identify unit-exchange status and CMM 29-09-05.

Last source review:
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IPC record

Identity and application.

The reviewed catalog row establishes the part identity and its location in the combined Hawker IPC. It does not establish the condition of a particular unit or approve that unit for installation.

AC61518 verified catalog fields
Part numberAC61518verified
Preferred nameHydraulic and brake reducing valveverified
IPC nomenclatureReducing valve; valve, reducing, Mark 3, unit exchange itemverified
SystemLanding gear and brakesverified
Primary ATA chapter32verified
Lookup variantsAC-61518verified
AC61518 catalog occurrences
Aircraft and publication scopeEffectivityFigure / itemQtyReview
Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope8266-8999 as printed in the IPC export32-40-10-10 / 1651verified
Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope8266-8999 as printed in the IPC export32-40-20-10 / 101verified
Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope8266-8999 as printed in the IPC export29-10-05-50 / 5301verified

Cross-reference check

Relationships and limits.

  • AC61518 appears in one ATA 29 hydraulic distribution figure and two ATA 32 brake-system figures.
  • The ATA 29 row adds the Mark 3 description; the exchange record references CMM 29-09-05.
  • No alternate or superseding number is printed on the reviewed rows.
Important limit

The repeated ATA 29 and ATA 32 placement adds system context but does not establish internal function, modification state, test status, or the exchange terms of an offered valve.

Mechanic's lookup notes

Common questions about AC61518.

Why does AC61518 appear in ATA 29 and ATA 32?

The same reducing-valve number is cataloged in the hydraulic distribution installation and repeated in two wheel-brake breakdowns.

Is AC61518 identified as a unit exchange item?

Yes. The reviewed exchange row references CMM 29-09-05. Core terms and offered-unit condition still come from the source.

Does the IPC print a replacement for AC61518?

No alternate or superseding part number is printed on the three reviewed rows.

Technical sources

  1. Hawker 800XP, 850XP and 900XP Illustrated Parts CatalogTextron Aviation

    Document
    IPC-800XP
    Revision
    A0
    Published
    2026-02-05
    Supports
    Part identities, nomenclature, figure and item references, quantity, effectivity, and relationship language as printed in the supplied IPC export.

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Same system

Related published records.

AC67732Brake control valve assemblyAC69784Emergency reducing valve assemblyTP42000Emergency brake pressure switch695-4-21Brake pressure transducer