Side-by-side IPC comparison
| Part number | IPC identity | Figure | Item | Quantity | Printed codes | Exchange notation |
|---|---|---|---|---|---|---|
| TP42000 | Pressure switch | 32-40-20-10 | 125 | 2 | AT, AV | Yes |
| TP42001 | Pressure switch | 32-40-20-15 | 160 | 1 | GX | Yes |
| 695-4-21 | Transducer | 32-40-20-10 | 30 | 2 | AW, AU | Not printed on the reviewed row |
All three reviewed rows print effectivity 8266-8999. The technical source supports the figure, item, quantity, codes, and nomenclature as printed.
TP42000 and TP42001 are separate records
Both numbers are pressure switches, but the catalog evidence is different:
- TP42000 appears in Figure 32-40-20-10 at item 125 with quantity two and codes AT and AV
- TP42001 appears in Figure 32-40-20-15 at item 160 with quantity one and code GX
The reviewed export does not call either number an alternate or replacement for the other. A shared plain-language name is not an interchangeability statement.
The 695-4-21 transducer record
The IPC identifies 695-4-21 as a transducer in Figure 32-40-20-10 at item 30. The row prints quantity two and codes AW and AU. A commercial source points users to 695-4-27, but that relationship does not appear in the reviewed IPC. It remains an unverified sourcing lead until approved data supports it.
Keep the printed 695-4-21 format on the request. Search variations such as 695.4.21 or the number without punctuation can help find listings, but they are not separate approved part numbers.
What the letter codes do not tell us here
The supplied export prints AT, AV, GX, AW, and AU without defining them. This guide does not assign those codes to aircraft positions, configurations, or functions. Use the legend in the current applicable catalog or another approved technical source to determine their meaning.
An undefined code is a reason to check the source, not a blank to fill with an assumption.
Sourcing checklist for these records
Include the following information when requesting one of these parts:
- exact part number and printed punctuation
- aircraft model and complete serial number
- IPC figure and item
- removed-unit part and serial numbers
- quantity required
- required condition, trace, and release paperwork
- any known configuration or modification information
- core availability and return terms when the switch is quoted on exchange
If a source offers a different number, ask for the approved cross-reference and check its direction and effectivity before accepting the quote.
Catalog identity is not installation approval
These rows establish catalog identity and location. They do not establish that a specific switch or transducer is serviceable, properly configured, or approved for installation. Match the physical unit and its paperwork to current approved data before use.
Direct lookup answers
Common questions.
Are TP42000 and TP42001 the same Hawker pressure switch?
The reviewed IPC does not identify them as the same or interchangeable. They appear in different figures and items, with different quantities and printed codes.
How many 695-4-21 transducers are printed in the IPC row?
The reviewed Figure 32-40-20-10 item 30 row prints a quantity of two for 695-4-21 and effectivity 8266-8999.
What do AT, AV, GX, AW, and AU mean in these IPC rows?
The supplied export prints those codes but does not define them. Check the current IPC legend and applicable technical publications before using a code for a configuration decision.
Technical sources
Hawker 800XP, 850XP and 900XP Illustrated Parts CatalogTextron Aviation
- Document
- IPC-800XP
- Revision
- A0
- Published
- 2026-02-05
- Supports
- The part identities, nomenclature, figure and item references, quantities, effectivity, and relationship language discussed in this guide, as printed in the supplied export.