live - low-
- lock-on range
- lock-out
- locked-in stall
- Lockheed gyro bar
- locking
- locus
- locus of aircraft attitude
- locus of axis of rotation
- locus of flight path
- loft
- log spiral
- log-log scale
- logarithmic decrement
- logarithmic relationship
- logger
- logging
- logic
- logic design
- logic matrix
- logic path
- logic test
- logistic support helicopter
- logistic supportability
- logistical aviation
- logistical support
- logistician
- logistics
- logistics design
- logistics expertise
- logistics integration
- logistics pipeline
- lognormal distribution
- logspiral trailing edge
- loiter
- loiter setting
- loiter wing loading
- loitering
- Lommel function
- long landing
- long lead item
