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Demo school. A sample flight school with four aircraft and two years of invented flights and bills (September 2024–August 2026). Sign in to see your own school's numbers.

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N4521KCessna 172S SkyhawkActive

Cessna 172S SkyhawkOwned

No flights or transactions in this range; not ranked

Sep 1, 2026 – Sep 30, 2026

September 2026

to
No flights or transactions in this range.
Revenue
$0
−100%vs. previous period
Hours flown
0.0
−100%vs. previous period
Revenue/hr
—
—vs. previous period
Utilization
0.0%
−38 ptsvs. previous period

Monthly performance

Apr–Sep, by calendar month.

Upcoming inspections

Maintenance
Due dateItemHours / intervalStatus
Nov 5, 2026estNext 100-hour76.7 hours to go
23% of the way
In 36 days
Dec 31, 2026Next annual12 calendar months
76% of the way
In 92 days
April 2028estOverhaul790.0 hours to the 2,000-hour TBO
61% of the way
In 549 days

Aircraft information

Make / model
Cessna 172S Skyhawk
Ownership
Owned
Engine TBO
2,000 hrs
Engine hours since overhaul (SMOH)
1,210 hrs (entered Aug 31, 2026)
Current tach
6351.2
Overhaul cost
$42,000
Hourly rate
$185/hr
Fuel burn
Not set

What the numbers show

Operating margin fell compared with the previous period, mostly on N4521K.

N4521K−$25,229 est

It went from $21,384 to -$3,845; the largest part was less revenue per hour.

Ideas schools in this spot often explore

  • Discounts, packages, or a change in the mix of dual and rental flying that move revenue per hour.
  • The bills behind the cost line that moved most, and whether they're one-off.
  • Which months in the period drove the change, and whether it repeats each year.

Ideas, not recommendations. Your situation may differ.

Show the numbers

The fleet's operating margin was -$3,845, down $25,229 from $21,384 in the previous period (Aug 2026); N4521K accounts for $12,319 of that change.

Operating margin: -$3,845
Previous period: $21,384
N4521K change: -$12,319
Operating margin: -$3,845
Previous period: $21,384
N4521K change: -$12,319

Facts from your data, not a diagnosis.

  • Revenue fell from $21,331 to $0, costing $21,331. main factor
    Revenue: $0
    Revenue, previous period: $21,331
    Revenue effect: -$21,331
  • Fuel cost fell from $6,207 to $0, adding $6,207. main factor
    Fuel: $0
    Fuel, previous period: $6,207
    Fuel effect: $6,207
  • Maintenance cost fell from $2,805 to $0, adding $2,805. smaller factor
    Maintenance: $0
    Maintenance, previous period: $2,805
    Maintenance effect: $2,805
  • Other changes: +$0. smaller factor
    Other changes: $0
    Total change: -$12,319

N4521K's next inspection falls in the same two weeks as other aircraft's.

N4521K

N4521K flew 48% of the fleet's hours, and the others are due within days of it, so they could all be down at once.

Ideas schools in this spot often explore

  • Bringing one inspection forward a few days so the aircraft aren't down at the same time.
  • Whether the shop can take two aircraft in the same week, and how long each would take.
  • Which bookings fall in those weeks and could move to other aircraft.

Ideas, not recommendations. Your situation may differ.

Show the numbers

N4521K's 100-hour (about Nov 5, 2026) falls within 14 days of N8123V's 100-hour (about Oct 27, 2026) and N744PS's 100-hour (about Oct 28, 2026) (projected). N4521K flew 48% of the fleet's hours from 2026-07-03 to 2026-09-30.

N4521K 100-hour: about Nov 5, 2026
Also due: N8123V 100-hour: about Oct 27, 2026
Also due: N744PS 100-hour: about Oct 28, 2026
N4521K share of fleet hours: 48%
N4521K 100-hour: about Nov 5, 2026
Also due: N8123V 100-hour: about Oct 27, 2026
Also due: N744PS 100-hour: about Oct 28, 2026
N4521K share of fleet hours: 48%

Facts from your data, not a diagnosis.

  • N4521K: 100-hour (about Nov 5, 2026); it flies about 46.4 tach hours a month, and flew 48% of the fleet's hours from 2026-07-03 to 2026-09-30. main factor
    N4521K hours per month: 46.4 h/month
    N4521K share of fleet hours: 48%
  • Also due within 14 days: N8123V's 100-hour (about Oct 27, 2026) and N744PS's 100-hour (about Oct 28, 2026). smaller factor
    Other aircraft due in the same weeks: 2
est Includes estimated values: inferred bills, placeholder fixed costs or allocated fuel. Figures for cancellations, downtime and unbilled ground sessions are estimates by design.

Informational only, based on your data. Not financial, legal, or aviation-maintenance advice.