The Part 135 Way

On a recent foggy morning in Hagerstown, Md., I sat waiting for the visibility to improve enough for me to depart on a Part 135 passenger flight. Every airport in the region was socked in with less than a quarter mile visibility, when a somewhat agitated passenger came up to me and asked what we were waiting for. I explained that the visibility had to improve before we would be legal to depart. In an incredibly ill-timed coincidence, we heard the sound of a single-engine piston departing from somewhere in the cloud outside the door, and my passenger snidely inquired why that plane could leave, but we couldnt. I felt like I had been asked to explain Bernoullis principle to a five-year-old. It was a deceptively complicated question, and one that should be of interest to pilots flying in their own aircraft under FAR Part 91.

Key Takeaways:

• Part 135 (commercial) regulations impose strict, objective minimums and detailed planning requirements for IFR departures and arrivals, covering weather forecasts, airport suitability, and contingency planning, offering a highly structured framework compared to Part 91 (personal) operations.
• Specific Part 135 rules mandate that destination weather must be forecast above minimums for departure, and actual weather must meet specific minimums to begin and continue an approach. Part 91, conversely, allows pilots greater discretion, including departing or attempting approaches even when reported weather is below minimums.
• The article notes that Part 135's structured approach contributes to an accident rate four times lower than Part 91 operations, which rely more on individual pilot judgment and personal minimums.
• Part 91 pilots are encouraged to voluntarily adopt the robust, safety-centric flight planning and decision-making model found in Part 135 regulations to enhance their operational safety.

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