131-9B Auxiliary
Power Unit

The 131-9B auxiliary power unit supplies electrical power and pneumatic air when the main engines are shut down. Commonly installed on Boeing 737 Next Generation and 737 MAX aircraft, the 131-9B supports engine starts, cabin conditioning, and onboard systems during ground operations. Airlines rely on this model for stable output, proven performance, and compatibility with narrow-body fleet requirements across routine airport environments.

Asset Portfolio

Operational Use and Reliability

Designed for consistent service, the 131-9B helps operators maintain efficient turnaround schedules and dependable ground support. The 131-9B provides reliable auxiliary power during maintenance, preflight checks, and extended gate times. Its established service history and widespread fleet use make it a practical APU solution for commercial aviation operations worldwide.

Model Number	MSN	Model	Manufacturer	Condition	Available For	Owner	Contact
GTCP331-200	P-1396	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	GA Telesis	John Wales +1 417-622-7215 LinkedIn
GTCP331-200	P-1464	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	GA Telesis	John Wales +1 417-622-7215 LinkedIn
GTCP331-200	P-1334	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	GA Telesis	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2460	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	Icelandair	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1245	GTCP331-200	Honeywell	Overhauled	Sale	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1515	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2509	GTCP331-200	Honeywell	Overhauled	Sale	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1345	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2783	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1081	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1685	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1094	GTCP331-200	Honeywell	Overhauled	Sale	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2697	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2621	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1148	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAT Piedmont	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1943	GTCP331-200	Honeywell	Overhauled	Exchange	TAT Piedmont	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2020	GTCP331-200	Honeywell	Overhauled	Exchange	TAT Piedmont	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1564	GTCP331-200	Honeywell	Overhauled	Sale, Lease or Exch	TAT Piedmont	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-2250	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAG.Aero	John Wales +1 417-622-7215 LinkedIn
GTCP331-200ER	P-1919	GTCP331-200	Honeywell	Serviceable	Sale, Lease or Exch	TAT Piedmont	John Wales +1 417-622-7215 LinkedIn

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Phone:

+1-872-233-4002

Corporate Address:

125 South Wacker Drive Suite 300 Chicago, Illinois 60606 United States

Warehouse:

19027 Jodi Road Unit D Mokena, Illinois 60448 United States

131-9B Auxiliary
Power Unit

Asset Portfolio

Operational Use and Reliability

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Contact Info

Email:

Phone:

Corporate Address:

125 South Wacker Drive Suite 300 Chicago, Illinois 60606 United States

Warehouse:

19027 Jodi Road Unit D Mokena, Illinois 60448 United States

131-9B Auxiliary Power Unit

Asset Portfolio

Operational Use and Reliability

131-9B Auxiliary
Power Unit