“Density Altitude”, FAA training film, 1966, Eastman color, about 24 minutes.

A young couple on a photographic assignment learns the hard way about the effects of high altitude and high temperatures on light aircraft. Airplanes can also suffer from a sort of hypoxia as well. Just like a person, its performance suffers when it’s not getting enough oxygen. Poor ol’ Harry Bliss and his wife Lois buy a new airplane which Harry thinks has all the power he will ever need, until he got to the mountains. He ignores some good advice and finds out the hard way.

Here is a timestamped summary of the film script you provided:

Time: A hot summer day

Place:

0:20 Lakefront Airport, New Orleans

Story:

0:24 The film focuses on the deceptive phenomenon known as density altitude which affects pilots.

0:31 Introduces Harry Bliss, a freelance photographer and private pilot with 473 flight hours, along with his wife and partner, Lois Bliss, who is a writer. They are commissioned by a magazine to cover the West with a series of illustrated articles.

0:42 Harry interacts with Charlie, an airport worker, loading their gear into the plane.

1:00 Lois and Harry discuss the logistics of their journey, ensuring they have all necessary equipment and reading materials.

Flight Journey:

2:29 The narrative begins with Harry and Lois taking off from New Orleans with confidence in their plane’s capabilities.

4:04 After 6 hours and one refueling stop, they arrive in Denver, Colorado, where they encounter Captain Marlo, who warns them about high altitude flying conditions.

6:22 Harry takes off from Denver, noting some performance issues but doesn’t fully grasp the impact of density altitude.

7:54 At Gunnison, Colorado (elevation 7,667 ft), they experience favorable conditions due to cold weather, but the next day, the temperature rises, affecting performance.

9:12 They decide to challenge the highest altitude airport in Leadville, Colorado, where they manage to land and take off due to favorable conditions.

10:24 At Monument Valley, Utah, they face hot weather conditions, leading to a challenging landing and takeoff due to high density altitude.

14:15 In Page, Arizona, they plan further travels but encounter issues with a helicopter due to density altitude affecting performance.

16:10 They arrive at Tahoe, California, where Harry ignores a warning sign about density altitude, leading to near-miss incidents.

18:40 Attempting to land at an uncharted airstrip at Tunnel Meadows, they face severe challenges due to high density altitude, barely managing to climb out after a long landing attempt.

20:59 They land at a nearby airport where they meet a local pilot who educates them about density altitude, its calculation, and its effects on aircraft performance.

25:00 The local pilot agrees to fly them into Tunnel Meadows the next morning, demonstrating how to handle high-altitude conditions safely.

Conclusion:

27:37 The script wraps up with another pilot experiencing issues at Tunnel Meadows, emphasizing the ongoing relevance of understanding density altitude for safe flying, especially in mountainous regions.