11 min read
91.213 Inoperative Equipment: When You Can Fly and What to Log
91.213 inoperative equipment in plain steps: who can use 91.213(d), how MEL operators differ, placards, the logbook entry, and the Part 135 rule.
Blog
Rules, checklists and the numbers behind them, for chief pilots, schedulers and charter operators.
Latest posts
11 min read
Aircraft Maintenance Forecasting: When Will Each Item Come Due?
Aircraft maintenance forecasting from utilization: calendar, hour and cycle limits, average daily use, a worked example, and downtime planned around trips.
13 min read
Aircraft Maintenance Tracking: What to Track, Keep and Prove
Aircraft maintenance tracking under Part 91: inspection programs, the records 91.417 requires and how long to keep them, ADs, life limits and counters.
12 min read
Aircraft Management Software: A Vendor Evaluation Checklist
An aircraft management software checklist: questions to ask in any demo or trial, grouped by area, the red flags to watch for, and a printable version.
12 min read
Aircraft Operating Cost Per Hour: What a Trip Really Costs
Aircraft operating cost per hour, built properly: variable, fixed and per-trip costs, one worked trip, and why the hourly number people quote misleads.
12 min read
Business Aviation Statistics: Fleet, Deliveries, Safety, Jobs
Business aviation statistics from primary sources: US fleet size, 2025 jet deliveries, hours flown, NTSB accident rates, pilot jobs and economic impact.
13 min read
Flight Department Chargeback: Cost Allocation and Part 91 Limits
A flight department chargeback, done within Part 91: cost allocation by hour, trip or fixed share, the 91.501 limits on charging, and federal excise tax.
12 min read
Flight Department Software Cost: Pricing Models and Hidden Costs
Flight department software cost explained: per aircraft, per user and per module pricing, setup and migration fees, contracts, and the costs buyers miss.
12 min read
Flight Department Software: What It Does and How to Choose
Flight department software explained for buyers: what it covers, how Part 91 and charter needs differ, when spreadsheets stop working and what to look for.
14 min read
Flight Risk Assessment Tool: A Sample FRAT You Can Adapt
Build a flight risk assessment tool that changes decisions: a sample FRAT with point values, score thresholds, tuning tips, and where it fits in SMS.
