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.
| Part number | 103278-13S1verified |
|---|---|
| Preferred name | Cabin air-pressure valveverified |
| IPC nomenclature | Valve assembly, cabin air pressure, pre Mod 25F586C and pre SB21-3621verified |
| System | Air conditioning and pressurizationverified |
| Primary ATA chapter | 21verified |
| Lookup variants | 10327813S1, 103278 13S1, 103278-13-S1verified |
| Aircraft and publication scope | Effectivity | Figure / item | Qty | Review |
|---|---|---|---|---|
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8401-8401,8421-8421,8434-8434,8447-8447 as printed in the IPC export | 21-30-05-10 / 15 | 1 | verified |
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8266-8277,8279-8279,8283-8284 as printed in the IPC export | 21-30-05-10 / 15 | 1 | verified |
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8266-8277,8279-8279,8283-8284,8401-8401,8421-8421,8434-8434,8447-8447 as printed in the IPC export | 21-30-05-10 / 44 | 1 | verified |
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8435-8445,8448-8588,8590-8598,8600-8616,8618-8618,8620-8999 as printed in the IPC export | 21-30-05-10B / 90 | 1 | verified |
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8278-8278,8280-8282,8285-8400,8402-8420,8422-8433,8589-8589,8599-8599,8617-8617,8619-8619 as printed in the IPC export | 21-30-05-10B / 90 | 1 | verified |
| Hawker 800XP, 850XP, and 900XP with kit 140-9004 publication scope | 8278-8278,8280-8282,8285-8400,8402-8420,8422-8433,8435-8445,8448-8999 as printed in the IPC export | 21-30-05-10B / 125 | 1 | verified |
Cross-reference check
Relationships and limits.
- The IPC uses both pre Mod 25F586C and pre SB21-3621 language for 103278-13S1.
- All six rows print quantity 1 and CMM 21-30-56.
- No reviewed row prints 103278-13S2 or 103278-18 as a direct replacement for this number.
The same aircraft serial can appear in different item stacks with different modification language. Match the installed position, embodied MOD, service-bulletin status, and current approved data before treating another 103278 dash number as acceptable.
Mechanic's lookup notes
Common questions about 103278-13S1.
Does 103278-13S2 automatically replace 103278-13S1?
No direct replacement statement appears in the reviewed IPC rows. The S1 and S2 records carry different MOD and service-bulletin wording, so configuration must be checked.
Which CMM is printed for 103278-13S1?
Each reviewed row references CMM 21-30-56. That manual was not supplied, so test limits and maintenance instructions are not stated here.
How many 103278-13S1 valves are listed per assembly?
Every reviewed application row prints quantity 1. The multiple rows reflect separate item and configuration records, not a quantity to add together.
Long-form context
Technical guides that use this record.
Technical sources
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.
Purchase or request quotes
Open a supplier or RFQ source below. Confirm effectivity, traceability, certification, condition, price, and current availability directly with the source.
- Allaero 103278 cabin-pressure valve familyRepair or overhaul
Link checked 2026-08-21 | Repair-capability page for the 103278 family; confirm the exact S1 configuration
- Allaero Hawker 800XP and 850XP inventoryDistributor
Link checked 2026-08-21 | Model inventory page lists 103278-13S1; verify condition and release