Sourcing a P2F conversion candidate: age, cycles and configuration that actually matter
Passenger-to-freighter conversion is among the most documented subjects in air cargo: programmes, door dimensions and pallet positions are all published. The step before it is documented far less — choosing the airframe that goes into the hangar. That choice fixes most of the economics before the first panel is cut.
The programme sets the frame, not the aircraft
On the 737-800, three programmes share the market: Boeing's 737-800BCF, AEI's 737-800SF and IAI's 737-800BDSF — twelve main-deck positions at Boeing and AEI alike, and close to 24 tonnes of payload for all three. On the A321-200, EFW's A321P2F — EFW being the ST Engineering–Airbus joint venture — offers 14 main-deck container positions plus 10 in the lower hold, for up to 28 tonnes; Precision's A321-200PCF is the alternative. The smaller A320P2F carries up to 21 tonnes.
Each programme has its own applicability. AEI states that its conversion covers every 737-800 line number, including aircraft with a flat aft pressure bulkhead or split scimitar winglets; EFW states that it covers all A320 and A321 weight variants. Those perimeters move over time. The first filter on any candidate is the current applicability list of the programme you intend to use — checked before the letter of intent, not after it.
Age is a proxy. Cycles and hours are the clock
Cirium data quoted by Air Cargo News puts 737-800 and A321 conversions at about 17 to 21 years old. Age is only the visible part. IBA puts it plainly: before an aircraft is selected, consider how many cycles and hours it will accumulate as a freighter. The 737NG's limit of validity is set at 75,000 flight cycles; for the A321-200, the reference limits are 48,000 cycles and 60,000 hours, before any Extended Service Goal package.
A 19-year-old airframe flown on long sectors and a 17-year-old one out of a short-haul low-cost network are different assets. Read the remaining margin against the intended utilisation — sectors per day, years of lease — not against the calendar. If a life extension is needed to reach the end of the planned lease, its cost belongs in the model from day one.
The engines often decide more than the airframe
At conversion age, a large share of a narrow-body's value sits in its engines — CFM56-7B on the 737-800, CFM56-5B or V2500 on the A321. Time since the last performance restoration, EGT margin, cycles remaining on life-limited parts module by module, thrust rating: two candidates that look identical on a listing can sit a full shop visit apart, which is more than the price gap between them. In its August 2026 review of the converted A321 fleet, IBA lists the high-thrust engine variants — demanding EGT margins, expensive shop visits — among the reasons for the type's disappointing acceptance.
Check position, records and the door-cut area
- Maintenance position at induction. Conversion downtime is the natural moment to absorb a heavy check. A candidate approaching one is not a defect, if the price reflects it and the work is planned with the conversion.
- Records. Back-to-birth traceability on life-limited parts, airworthiness directive compliance, a complete repair file. A documentary gap costs more to cure on a 20-year-old aircraft that has been through several operators.
- Structure. Repair and corrosion history in the forward left fuselage where the main-deck door is cut, and along the reinforced floor structure, can complicate the engineering or add to the bill.
All of this can be read from the records, before anyone pays for a physical inspection.
Choosing feedstock means reading three numbers together: what the airframe costs, what the conversion and its downtime cost, and what the freighter earns afterwards. The third is not a constant. IBA's August 2026 round-up counts 85 A321-200 conversions since January 2020 against 265 for the 737-800; 34 converted A321s — 42% of the installed fleet, by IBA's count — are in storage, and market lease rates sit 18 to 24% below base rates on the examples it cites. A cheap airframe does not repair a thin rate.
Configuration, title and what comes attached
The weight variant drives payload and range after conversion; raising it is sometimes paperwork, sometimes structure. Winglets or sharklets must be covered by the programme you have chosen. The avionics standard has to meet the requirements of the destination registry. Then title: a clean chain of ownership, an International Registry search, no liens, a workable deregistration path. An aircraft sold with a lease attached can be the right purchase — provided its redelivery date and redelivery conditions line up with the slot.
Matching the airframe to the slot
Conversion slots are booked ahead. An airframe that arrives late loses its slot; one that arrives early parks and pays storage. Delivery date under the purchase agreement, redelivery by the last passenger operator, ferry flight, condition required at induction: all of it belongs on a single timeline, agreed before the deposit moves.
What we do on a feedstock mandate
We source against a written specification — type, conversion programme, slot window, engine and cycle thresholds, budget — including aircraft that are not openly marketed, typically at airlines phasing a type out of their fleet. We screen the records before you commit to an inspection. The buyer's name and budget do not circulate.
Looking for feedstock against a conversion slot?
Send us the type, the target conversion programme and the slot date. We source against that specification and screen the records before you pay for an inspection.
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