Honeywell 131-9B APU for Boeing 737NG & 737 MAX
Sale, exchange and lease sourcing for the GTCP131-9B, with release certificate and trace confirmed before we quote.
131-9B APU at a glance
| Manufacturer | Honeywell Aerospace |
| Model | GTCP131-9B (131-9[B]) |
| Part number (FAA TSO-C77a listing) | 3800702-1 |
| Typical application | Boeing 737 Next Generation (-600/-700/-800/-900) and 737 MAX |
| Typical ATA chapter | 49 (Airborne auxiliary power) |
| Conditions we source | NE/NS, OH, SV, AR |
| Release certificates | FAA 8130-3, EASA Form 1 or dual release |
Part numbers and effectivity are for identification only. Confirm against your aircraft's IPC and effectivity; we confirm the exact P/N, dash number and mod status in every written quote.
About the 131-9B
The 131-9B is Honeywell's 131-9 series APU for single-aisle Boeing aircraft. Per Honeywell, the 131 series uses a two-stage axial turbine and a single starter/generator, and has logged more than 100 million in-service hours. Honeywell also offers a High Efficiency Mode (HEM) upgrade for the 131-9B. When you request a quote, tell us whether you need a MAX-compliant configuration or a specific mod status, and we'll match units to that requirement.
Ways to buy a 131-9B APU
Exchange
Serviceable unit now, your removed core returned on agreed terms. The usual route for AOG and unscheduled removals.Outright
OH, SV or AR units with release certificate and trace, for spares or a beyond-economical-repair core.Lease
Cover while your own unit is in the shop. Compare options →Sell yours
Have a surplus or as-removed 131-9B APU? Send us the details →Documentation we require
FAA 8130-3 and/or EASA Form 1 from the certified repair station for OH/SV units, trace to last operator or back-to-birth where available, non-incident statement, and shop/removal records. Our documentation standards →
131-9B APU FAQ
What aircraft use the 131-9B APU?
The Honeywell 131-9B is fitted to Boeing 737 Next Generation and 737 MAX aircraft. Always confirm effectivity against your aircraft's IPC.
What is the part number for the 131-9B?
The FAA TSO-C77a listing shows model 131-9[B] as P/N 3800702-1. Dash numbers and mod status vary, so we confirm the exact configuration in the quote.
Is the 131-9B the same as the 131-9A?
No. The 131-9A (P/N 3800708-1) is the Airbus A319/A320/A321 variant. The two are not interchangeable between aircraft types.
Do you have a 131-9B in stock?
Ironbridge Aero is a broker and does not claim stock. We source units through our supplier network and confirm availability, condition, documents and price in a written quote, usually within 2 business hours.
Request a 131-9B APU quote AOG 24/7: 1-855-505-5743
Other models we source: Honeywell 131-9A · Honeywell GTCP85-129H · APS2000 (Hamilton Sundstrand / P&WC)